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Finding the Fourth Proportional to 103,691.10, 155,536.65 and 72,034.28

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Solution

The fourth proportional to 103,691.10, 155,536.65 and 72,034.28 is: 108,051.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,691.10 : 155,536.65 = 72,034.28 : x
  2. Step 2: Convert to fraction form
    103,691.10/155,536.65 = 72,034.28/x
  3. Step 3: Cross multiply
    103,691.10x = 155,536.65 × 72,034.28
  4. Step 4: Simplify right side
    103,691.10x = 11,203,970,596.36
  5. Step 5: Solve for x
    x = 11,203,970,596.36/103,691.10
  6. Step 6: Final answer
    x = 108,051.42

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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.