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Finding the Fourth Proportional to 83,246.80, 124,870.20 and 81,864.40

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Solution

The fourth proportional to 83,246.80, 124,870.20 and 81,864.40 is: 122,796.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,246.80 : 124,870.20 = 81,864.40 : x
  2. Step 2: Convert to fraction form
    83,246.80/124,870.20 = 81,864.40/x
  3. Step 3: Cross multiply
    83,246.80x = 124,870.20 × 81,864.40
  4. Step 4: Simplify right side
    83,246.80x = 10,222,424,000.88
  5. Step 5: Solve for x
    x = 10,222,424,000.88/83,246.80
  6. Step 6: Final answer
    x = 122,796.60

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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.