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Finding the Fourth Proportional to 266,147.88, 399,287.30 and 79,159.38

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Solution

The fourth proportional to 266,147.88, 399,287.30 and 79,159.38 is: 118,758.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,147.88 : 399,287.30 = 79,159.38 : x
  2. Step 2: Convert to fraction form
    266,147.88/399,287.30 = 79,159.38/x
  3. Step 3: Cross multiply
    266,147.88x = 399,287.30 × 79,159.38
  4. Step 4: Simplify right side
    266,147.88x = 31,607,334,714.08
  5. Step 5: Solve for x
    x = 31,607,334,714.08/266,147.88
  6. Step 6: Final answer
    x = 118,758.54

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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.