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Finding the Fourth Proportional to 113,505.46, 156,638.59 and 62,520

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Solution

The fourth proportional to 113,505.46, 156,638.59 and 62,520 is: 86,278.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,505.46 : 156,638.59 = 62,520 : x
  2. Step 2: Convert to fraction form
    113,505.46/156,638.59 = 62,520/x
  3. Step 3: Cross multiply
    113,505.46x = 156,638.59 × 62,520
  4. Step 4: Simplify right side
    113,505.46x = 9,793,044,646.80
  5. Step 5: Solve for x
    x = 9,793,044,646.80/113,505.46
  6. Step 6: Final answer
    x = 86,278.18

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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.