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Finding the Fourth Proportional to 81,790.71, 122,686.08 and 25,630.80

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Solution

The fourth proportional to 81,790.71, 122,686.08 and 25,630.80 is: 38,446.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,790.71 : 122,686.08 = 25,630.80 : x
  2. Step 2: Convert to fraction form
    81,790.71/122,686.08 = 25,630.80/x
  3. Step 3: Cross multiply
    81,790.71x = 122,686.08 × 25,630.80
  4. Step 4: Simplify right side
    81,790.71x = 3,144,542,251.11
  5. Step 5: Solve for x
    x = 3,144,542,251.11/81,790.71
  6. Step 6: Final answer
    x = 38,446.21

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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.