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Finding the Fourth Proportional to 121,498.82, 182,309.70 and 81,972.90

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Solution

The fourth proportional to 121,498.82, 182,309.70 and 81,972.90 is: 123,000.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,498.82 : 182,309.70 = 81,972.90 : x
  2. Step 2: Convert to fraction form
    121,498.82/182,309.70 = 81,972.90/x
  3. Step 3: Cross multiply
    121,498.82x = 182,309.70 × 81,972.90
  4. Step 4: Simplify right side
    121,498.82x = 14,944,454,807.13
  5. Step 5: Solve for x
    x = 14,944,454,807.13/121,498.82
  6. Step 6: Final answer
    x = 123,000.82

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1.5x scale

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.