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Finding the Fourth Proportional to 121,279.40, 181,854.30 and 51,079.40

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Solution

The fourth proportional to 121,279.40, 181,854.30 and 51,079.40 is: 76,591.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,279.40 : 181,854.30 = 51,079.40 : x
  2. Step 2: Convert to fraction form
    121,279.40/181,854.30 = 51,079.40/x
  3. Step 3: Cross multiply
    121,279.40x = 181,854.30 × 51,079.40
  4. Step 4: Simplify right side
    121,279.40x = 9,289,008,531.42
  5. Step 5: Solve for x
    x = 9,289,008,531.42/121,279.40
  6. Step 6: Final answer
    x = 76,591.81

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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.