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Finding the Fourth Proportional to 73,125.90, 109,688.85 and 28,737.90

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Solution

The fourth proportional to 73,125.90, 109,688.85 and 28,737.90 is: 43,106.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,125.90 : 109,688.85 = 28,737.90 : x
  2. Step 2: Convert to fraction form
    73,125.90/109,688.85 = 28,737.90/x
  3. Step 3: Cross multiply
    73,125.90x = 109,688.85 × 28,737.90
  4. Step 4: Simplify right side
    73,125.90x = 3,152,227,202.42
  5. Step 5: Solve for x
    x = 3,152,227,202.42/73,125.90
  6. Step 6: Final answer
    x = 43,106.85

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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.