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Finding the Fourth Proportional to 99,492.47, 137,292.68 and 56,472.85

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Solution

The fourth proportional to 99,492.47, 137,292.68 and 56,472.85 is: 77,928.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,492.47 : 137,292.68 = 56,472.85 : x
  2. Step 2: Convert to fraction form
    99,492.47/137,292.68 = 56,472.85/x
  3. Step 3: Cross multiply
    99,492.47x = 137,292.68 × 56,472.85
  4. Step 4: Simplify right side
    99,492.47x = 7,753,307,954.91
  5. Step 5: Solve for x
    x = 7,753,307,954.91/99,492.47
  6. Step 6: Final answer
    x = 77,928.59

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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.