Home / 121,116.60-181,502.10-89,278.20

Finding the Fourth Proportional to 121,116.60, 181,502.10 and 89,278.20

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Solution

The fourth proportional to 121,116.60, 181,502.10 and 89,278.20 is: 133,789.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,116.60 : 181,502.10 = 89,278.20 : x
  2. Step 2: Convert to fraction form
    121,116.60/181,502.10 = 89,278.20/x
  3. Step 3: Cross multiply
    121,116.60x = 181,502.10 × 89,278.20
  4. Step 4: Simplify right side
    121,116.60x = 16,204,180,784.22
  5. Step 5: Solve for x
    x = 16,204,180,784.22/121,116.60
  6. Step 6: Final answer
    x = 133,789.92

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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.