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Finding the Fourth Proportional to 60,856.70, 91,285.05 and 21,458.30

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Solution

The fourth proportional to 60,856.70, 91,285.05 and 21,458.30 is: 32,187.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,856.70 : 91,285.05 = 21,458.30 : x
  2. Step 2: Convert to fraction form
    60,856.70/91,285.05 = 21,458.30/x
  3. Step 3: Cross multiply
    60,856.70x = 91,285.05 × 21,458.30
  4. Step 4: Simplify right side
    60,856.70x = 1,958,821,988.42
  5. Step 5: Solve for x
    x = 1,958,821,988.42/60,856.70
  6. Step 6: Final answer
    x = 32,187.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.