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Finding the Fourth Proportional to 66,614.74, 91,929.40 and 39,772.96

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Solution

The fourth proportional to 66,614.74, 91,929.40 and 39,772.96 is: 54,887.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,614.74 : 91,929.40 = 39,772.96 : x
  2. Step 2: Convert to fraction form
    66,614.74/91,929.40 = 39,772.96/x
  3. Step 3: Cross multiply
    66,614.74x = 91,929.40 × 39,772.96
  4. Step 4: Simplify right side
    66,614.74x = 3,656,304,019.77
  5. Step 5: Solve for x
    x = 3,656,304,019.77/66,614.74
  6. Step 6: Final answer
    x = 54,887.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.