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Finding the Fourth Proportional to 266,513.05, 399,710.70 and 76,932.21

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Solution

The fourth proportional to 266,513.05, 399,710.70 and 76,932.21 is: 115,381.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,513.05 : 399,710.70 = 76,932.21 : x
  2. Step 2: Convert to fraction form
    266,513.05/399,710.70 = 76,932.21/x
  3. Step 3: Cross multiply
    266,513.05x = 399,710.70 × 76,932.21
  4. Step 4: Simplify right side
    266,513.05x = 30,750,627,511.65
  5. Step 5: Solve for x
    x = 30,750,627,511.65/266,513.05
  6. Step 6: Final answer
    x = 115,381.32

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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.