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Finding the Fourth Proportional to 266,147.38, 399,286.55 and 79,158.88

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Solution

The fourth proportional to 266,147.38, 399,286.55 and 79,158.88 is: 118,757.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,147.38 : 399,286.55 = 79,158.88 : x
  2. Step 2: Convert to fraction form
    266,147.38/399,286.55 = 79,158.88/x
  3. Step 3: Cross multiply
    266,147.38x = 399,286.55 × 79,158.88
  4. Step 4: Simplify right side
    266,147.38x = 31,607,076,097.06
  5. Step 5: Solve for x
    x = 31,607,076,097.06/266,147.38
  6. Step 6: Final answer
    x = 118,757.80

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1.5x scale

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.