Home / 103,500.70-155,251.05-72,007.90

Finding the Fourth Proportional to 103,500.70, 155,251.05 and 72,007.90

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Solution

The fourth proportional to 103,500.70, 155,251.05 and 72,007.90 is: 108,011.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,500.70 : 155,251.05 = 72,007.90 : x
  2. Step 2: Convert to fraction form
    103,500.70/155,251.05 = 72,007.90/x
  3. Step 3: Cross multiply
    103,500.70x = 155,251.05 × 72,007.90
  4. Step 4: Simplify right side
    103,500.70x = 11,179,302,083.30
  5. Step 5: Solve for x
    x = 11,179,302,083.30/103,500.70
  6. Step 6: Final answer
    x = 108,011.85

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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.