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Finding the Fourth Proportional to 266,154.77, 399,295.08 and 86,239.89

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Solution

The fourth proportional to 266,154.77, 399,295.08 and 86,239.89 is: 129,380.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,154.77 : 399,295.08 = 86,239.89 : x
  2. Step 2: Convert to fraction form
    266,154.77/399,295.08 = 86,239.89/x
  3. Step 3: Cross multiply
    266,154.77x = 399,295.08 × 86,239.89
  4. Step 4: Simplify right side
    266,154.77x = 34,435,163,776.74
  5. Step 5: Solve for x
    x = 34,435,163,776.74/266,154.77
  6. Step 6: Final answer
    x = 129,380.22

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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.