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Finding the Fourth Proportional to 42,480.87, 63,729.80 and 23,787.48

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Solution

The fourth proportional to 42,480.87, 63,729.80 and 23,787.48 is: 35,685.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,480.87 : 63,729.80 = 23,787.48 : x
  2. Step 2: Convert to fraction form
    42,480.87/63,729.80 = 23,787.48/x
  3. Step 3: Cross multiply
    42,480.87x = 63,729.80 × 23,787.48
  4. Step 4: Simplify right side
    42,480.87x = 1,515,971,342.90
  5. Step 5: Solve for x
    x = 1,515,971,342.90/42,480.87
  6. Step 6: Final answer
    x = 35,685.98

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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.