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Finding the Fourth Proportional to 99,791.28, 149,722.34 and 62,307.90

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Solution

The fourth proportional to 99,791.28, 149,722.34 and 62,307.90 is: 93,483.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,791.28 : 149,722.34 = 62,307.90 : x
  2. Step 2: Convert to fraction form
    99,791.28/149,722.34 = 62,307.90/x
  3. Step 3: Cross multiply
    99,791.28x = 149,722.34 × 62,307.90
  4. Step 4: Simplify right side
    99,791.28x = 9,328,884,276.95
  5. Step 5: Solve for x
    x = 9,328,884,276.95/99,791.28
  6. Step 6: Final answer
    x = 93,483.96

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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.