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Finding the Fourth Proportional to 61,214.40, 85,816.80 and 61,214.40

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Solution

The fourth proportional to 61,214.40, 85,816.80 and 61,214.40 is: 85,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,214.40 : 85,816.80 = 61,214.40 : x
  2. Step 2: Convert to fraction form
    61,214.40/85,816.80 = 61,214.40/x
  3. Step 3: Cross multiply
    61,214.40x = 85,816.80 × 61,214.40
  4. Step 4: Simplify right side
    61,214.40x = 5,253,223,921.92
  5. Step 5: Solve for x
    x = 5,253,223,921.92/61,214.40
  6. Step 6: Final answer
    x = 85,816.80

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.