Home / 121,490.20-182,429.70-82,221.40

Finding the Fourth Proportional to 121,490.20, 182,429.70 and 82,221.40

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Solution

The fourth proportional to 121,490.20, 182,429.70 and 82,221.40 is: 123,463.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,490.20 : 182,429.70 = 82,221.40 : x
  2. Step 2: Convert to fraction form
    121,490.20/182,429.70 = 82,221.40/x
  3. Step 3: Cross multiply
    121,490.20x = 182,429.70 × 82,221.40
  4. Step 4: Simplify right side
    121,490.20x = 14,999,625,335.58
  5. Step 5: Solve for x
    x = 14,999,625,335.58/121,490.20
  6. Step 6: Final answer
    x = 123,463.66

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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.