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Finding the Fourth Proportional to 266,165.10, 399,247.65 and 133,065.90

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Solution

The fourth proportional to 266,165.10, 399,247.65 and 133,065.90 is: 199,598.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,165.10 : 399,247.65 = 133,065.90 : x
  2. Step 2: Convert to fraction form
    266,165.10/399,247.65 = 133,065.90/x
  3. Step 3: Cross multiply
    266,165.10x = 399,247.65 × 133,065.90
  4. Step 4: Simplify right side
    266,165.10x = 53,126,247,870.14
  5. Step 5: Solve for x
    x = 53,126,247,870.14/266,165.10
  6. Step 6: Final answer
    x = 199,598.85

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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.