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Finding the Fourth Proportional to 60,665.87, 90,999.05 and 18,545.80

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Solution

The fourth proportional to 60,665.87, 90,999.05 and 18,545.80 is: 27,818.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,665.87 : 90,999.05 = 18,545.80 : x
  2. Step 2: Convert to fraction form
    60,665.87/90,999.05 = 18,545.80/x
  3. Step 3: Cross multiply
    60,665.87x = 90,999.05 × 18,545.80
  4. Step 4: Simplify right side
    60,665.87x = 1,687,649,633.77
  5. Step 5: Solve for x
    x = 1,687,649,633.77/60,665.87
  6. Step 6: Final answer
    x = 27,818.77

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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.