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Finding the Fourth Proportional to 103,488.88, 155,200.92 and 68,613.52

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Solution

The fourth proportional to 103,488.88, 155,200.92 and 68,613.52 is: 102,898.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,488.88 : 155,200.92 = 68,613.52 : x
  2. Step 2: Convert to fraction form
    103,488.88/155,200.92 = 68,613.52/x
  3. Step 3: Cross multiply
    103,488.88x = 155,200.92 × 68,613.52
  4. Step 4: Simplify right side
    103,488.88x = 10,648,881,428.44
  5. Step 5: Solve for x
    x = 10,648,881,428.44/103,488.88
  6. Step 6: Final answer
    x = 102,898.80

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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.