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Finding the Fourth Proportional to 266,154.50, 399,294.66 and 86,239.62

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Solution

The fourth proportional to 266,154.50, 399,294.66 and 86,239.62 is: 129,379.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,154.50 : 399,294.66 = 86,239.62 : x
  2. Step 2: Convert to fraction form
    266,154.50/399,294.66 = 86,239.62/x
  3. Step 3: Cross multiply
    266,154.50x = 399,294.66 × 86,239.62
  4. Step 4: Simplify right side
    266,154.50x = 34,435,019,746.43
  5. Step 5: Solve for x
    x = 34,435,019,746.43/266,154.50
  6. Step 6: Final answer
    x = 129,379.81

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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.