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Finding the Fourth Proportional to 81,425.61, 112,359.83 and 45,617.13

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Solution

The fourth proportional to 81,425.61, 112,359.83 and 45,617.13 is: 62,947.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,425.61 : 112,359.83 = 45,617.13 : x
  2. Step 2: Convert to fraction form
    81,425.61/112,359.83 = 45,617.13/x
  3. Step 3: Cross multiply
    81,425.61x = 112,359.83 × 45,617.13
  4. Step 4: Simplify right side
    81,425.61x = 5,125,532,743.80
  5. Step 5: Solve for x
    x = 5,125,532,743.80/81,425.61
  6. Step 6: Final answer
    x = 62,947.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.