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Finding the Fourth Proportional to 61,664.70, 86,133.75 and 61,664.70

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Solution

The fourth proportional to 61,664.70, 86,133.75 and 61,664.70 is: 86,133.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,664.70 : 86,133.75 = 61,664.70 : x
  2. Step 2: Convert to fraction form
    61,664.70/86,133.75 = 61,664.70/x
  3. Step 3: Cross multiply
    61,664.70x = 86,133.75 × 61,664.70
  4. Step 4: Simplify right side
    61,664.70x = 5,311,411,853.63
  5. Step 5: Solve for x
    x = 5,311,411,853.63/61,664.70
  6. Step 6: Final answer
    x = 86,133.75

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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.