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Finding the Fourth Proportional to 266,637.87, 399,978.09 and 89,145.81

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Solution

The fourth proportional to 266,637.87, 399,978.09 and 89,145.81 is: 133,725.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,637.87 : 399,978.09 = 89,145.81 : x
  2. Step 2: Convert to fraction form
    266,637.87/399,978.09 = 89,145.81/x
  3. Step 3: Cross multiply
    266,637.87x = 399,978.09 × 89,145.81
  4. Step 4: Simplify right side
    266,637.87x = 35,656,370,815.30
  5. Step 5: Solve for x
    x = 35,656,370,815.30/266,637.87
  6. Step 6: Final answer
    x = 133,725.83

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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.