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Finding the Fourth Proportional to 266,426.69, 399,634.40 and 86,511.92

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Solution

The fourth proportional to 266,426.69, 399,634.40 and 86,511.92 is: 129,766.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,426.69 : 399,634.40 = 86,511.92 : x
  2. Step 2: Convert to fraction form
    266,426.69/399,634.40 = 86,511.92/x
  3. Step 3: Cross multiply
    266,426.69x = 399,634.40 × 86,511.92
  4. Step 4: Simplify right side
    266,426.69x = 34,573,140,953.73
  5. Step 5: Solve for x
    x = 34,573,140,953.73/266,426.69
  6. Step 6: Final answer
    x = 129,766.05

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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.