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Finding the Fourth Proportional to 121,279.06, 181,938.03 and 51,168.70

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Solution

The fourth proportional to 121,279.06, 181,938.03 and 51,168.70 is: 76,761.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,279.06 : 181,938.03 = 51,168.70 : x
  2. Step 2: Convert to fraction form
    121,279.06/181,938.03 = 51,168.70/x
  3. Step 3: Cross multiply
    121,279.06x = 181,938.03 × 51,168.70
  4. Step 4: Simplify right side
    121,279.06x = 9,309,532,475.66
  5. Step 5: Solve for x
    x = 9,309,532,475.66/121,279.06
  6. Step 6: Final answer
    x = 76,761.25

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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.