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Finding the Fourth Proportional to 62,390.71, 86,130.92 and 38,531.22

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Solution

The fourth proportional to 62,390.71, 86,130.92 and 38,531.22 is: 53,192.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,390.71 : 86,130.92 = 38,531.22 : x
  2. Step 2: Convert to fraction form
    62,390.71/86,130.92 = 38,531.22/x
  3. Step 3: Cross multiply
    62,390.71x = 86,130.92 × 38,531.22
  4. Step 4: Simplify right side
    62,390.71x = 3,318,729,427.32
  5. Step 5: Solve for x
    x = 3,318,729,427.32/62,390.71
  6. Step 6: Final answer
    x = 53,192.69

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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.