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Finding the Fourth Proportional to 266,697.72, 400,061.28 and 79,723.80

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Solution

The fourth proportional to 266,697.72, 400,061.28 and 79,723.80 is: 119,590.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,697.72 : 400,061.28 = 79,723.80 : x
  2. Step 2: Convert to fraction form
    266,697.72/400,061.28 = 79,723.80/x
  3. Step 3: Cross multiply
    266,697.72x = 400,061.28 × 79,723.80
  4. Step 4: Simplify right side
    266,697.72x = 31,894,405,474.46
  5. Step 5: Solve for x
    x = 31,894,405,474.46/266,697.72
  6. Step 6: Final answer
    x = 119,590.09

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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.