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Finding the Fourth Proportional to 92,468.40, 138,767.40 and 39,915.60

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Solution

The fourth proportional to 92,468.40, 138,767.40 and 39,915.60 is: 59,901.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,468.40 : 138,767.40 = 39,915.60 : x
  2. Step 2: Convert to fraction form
    92,468.40/138,767.40 = 39,915.60/x
  3. Step 3: Cross multiply
    92,468.40x = 138,767.40 × 39,915.60
  4. Step 4: Simplify right side
    92,468.40x = 5,538,984,031.44
  5. Step 5: Solve for x
    x = 5,538,984,031.44/92,468.40
  6. Step 6: Final answer
    x = 59,901.37

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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.