Home / 103,385.72-155,089.36-28,505.87

Finding the Fourth Proportional to 103,385.72, 155,089.36 and 28,505.87

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Solution

The fourth proportional to 103,385.72, 155,089.36 and 28,505.87 is: 42,761.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,385.72 : 155,089.36 = 28,505.87 : x
  2. Step 2: Convert to fraction form
    103,385.72/155,089.36 = 28,505.87/x
  3. Step 3: Cross multiply
    103,385.72x = 155,089.36 × 28,505.87
  4. Step 4: Simplify right side
    103,385.72x = 4,420,957,768.52
  5. Step 5: Solve for x
    x = 4,420,957,768.52/103,385.72
  6. Step 6: Final answer
    x = 42,761.78

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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.