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Finding the Fourth Proportional to 42,387.68, 63,561 and 25,539.68

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Solution

The fourth proportional to 42,387.68, 63,561 and 25,539.68 is: 38,297.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,387.68 : 63,561 = 25,539.68 : x
  2. Step 2: Convert to fraction form
    42,387.68/63,561 = 25,539.68/x
  3. Step 3: Cross multiply
    42,387.68x = 63,561 × 25,539.68
  4. Step 4: Simplify right side
    42,387.68x = 1,623,327,600.48
  5. Step 5: Solve for x
    x = 1,623,327,600.48/42,387.68
  6. Step 6: Final answer
    x = 38,297.16

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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.