Home / 266,121.20-399,181.80-79,132.70

Finding the Fourth Proportional to 266,121.20, 399,181.80 and 79,132.70

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Solution

The fourth proportional to 266,121.20, 399,181.80 and 79,132.70 is: 118,699.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,121.20 : 399,181.80 = 79,132.70 : x
  2. Step 2: Convert to fraction form
    266,121.20/399,181.80 = 79,132.70/x
  3. Step 3: Cross multiply
    266,121.20x = 399,181.80 × 79,132.70
  4. Step 4: Simplify right side
    266,121.20x = 31,588,333,624.86
  5. Step 5: Solve for x
    x = 31,588,333,624.86/266,121.20
  6. Step 6: Final answer
    x = 118,699.05

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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.