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Finding the Fourth Proportional to 103,712.58, 155,691.89 and 87,277.27

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Solution

The fourth proportional to 103,712.58, 155,691.89 and 87,277.27 is: 131,019.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,712.58 : 155,691.89 = 87,277.27 : x
  2. Step 2: Convert to fraction form
    103,712.58/155,691.89 = 87,277.27/x
  3. Step 3: Cross multiply
    103,712.58x = 155,691.89 × 87,277.27
  4. Step 4: Simplify right side
    103,712.58x = 13,588,363,120.34
  5. Step 5: Solve for x
    x = 13,588,363,120.34/103,712.58
  6. Step 6: Final answer
    x = 131,019.43

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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.