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Finding the Fourth Proportional to 91,856.70, 137,785.05 and 60,363.90

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Solution

The fourth proportional to 91,856.70, 137,785.05 and 60,363.90 is: 90,545.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,856.70 : 137,785.05 = 60,363.90 : x
  2. Step 2: Convert to fraction form
    91,856.70/137,785.05 = 60,363.90/x
  3. Step 3: Cross multiply
    91,856.70x = 137,785.05 × 60,363.90
  4. Step 4: Simplify right side
    91,856.70x = 8,317,242,979.70
  5. Step 5: Solve for x
    x = 8,317,242,979.70/91,856.70
  6. Step 6: Final answer
    x = 90,545.85

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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.