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Finding the Fourth Proportional to 83,011.80, 124,517.70 and 20,682.30

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Solution

The fourth proportional to 83,011.80, 124,517.70 and 20,682.30 is: 31,023.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,011.80 : 124,517.70 = 20,682.30 : x
  2. Step 2: Convert to fraction form
    83,011.80/124,517.70 = 20,682.30/x
  3. Step 3: Cross multiply
    83,011.80x = 124,517.70 × 20,682.30
  4. Step 4: Simplify right side
    83,011.80x = 2,575,312,426.71
  5. Step 5: Solve for x
    x = 2,575,312,426.71/83,011.80
  6. Step 6: Final answer
    x = 31,023.45

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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.