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Finding the Fourth Proportional to 84,262.65, 126,022.19 and 74,967.90

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Solution

The fourth proportional to 84,262.65, 126,022.19 and 74,967.90 is: 112,121.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,262.65 : 126,022.19 = 74,967.90 : x
  2. Step 2: Convert to fraction form
    84,262.65/126,022.19 = 74,967.90/x
  3. Step 3: Cross multiply
    84,262.65x = 126,022.19 × 74,967.90
  4. Step 4: Simplify right side
    84,262.65x = 9,447,618,562.86
  5. Step 5: Solve for x
    x = 9,447,618,562.86/84,262.65
  6. Step 6: Final answer
    x = 112,121.07

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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.