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Finding the Fourth Proportional to 121,327.20, 181,990.80 and 91,802.70

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Solution

The fourth proportional to 121,327.20, 181,990.80 and 91,802.70 is: 137,704.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,327.20 : 181,990.80 = 91,802.70 : x
  2. Step 2: Convert to fraction form
    121,327.20/181,990.80 = 91,802.70/x
  3. Step 3: Cross multiply
    121,327.20x = 181,990.80 × 91,802.70
  4. Step 4: Simplify right side
    121,327.20x = 16,707,246,815.16
  5. Step 5: Solve for x
    x = 16,707,246,815.16/121,327.20
  6. Step 6: Final answer
    x = 137,704.05

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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.