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Finding the Fourth Proportional to 104,425.40, 156,638.10 and 72,932.60

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Solution

The fourth proportional to 104,425.40, 156,638.10 and 72,932.60 is: 109,398.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,425.40 : 156,638.10 = 72,932.60 : x
  2. Step 2: Convert to fraction form
    104,425.40/156,638.10 = 72,932.60/x
  3. Step 3: Cross multiply
    104,425.40x = 156,638.10 × 72,932.60
  4. Step 4: Simplify right side
    104,425.40x = 11,424,023,892.06
  5. Step 5: Solve for x
    x = 11,424,023,892.06/104,425.40
  6. Step 6: Final answer
    x = 109,398.90

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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.