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Finding the Fourth Proportional to 136,545.81, 188,356.05 and 85,469.88

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Solution

The fourth proportional to 136,545.81, 188,356.05 and 85,469.88 is: 117,900.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,545.81 : 188,356.05 = 85,469.88 : x
  2. Step 2: Convert to fraction form
    136,545.81/188,356.05 = 85,469.88/x
  3. Step 3: Cross multiply
    136,545.81x = 188,356.05 × 85,469.88
  4. Step 4: Simplify right side
    136,545.81x = 16,098,768,563.42
  5. Step 5: Solve for x
    x = 16,098,768,563.42/136,545.81
  6. Step 6: Final answer
    x = 117,900.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.