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Finding the Fourth Proportional to 81,505.89, 112,478.13 and 45,695.97

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Solution

The fourth proportional to 81,505.89, 112,478.13 and 45,695.97 is: 63,060.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,505.89 : 112,478.13 = 45,695.97 : x
  2. Step 2: Convert to fraction form
    81,505.89/112,478.13 = 45,695.97/x
  3. Step 3: Cross multiply
    81,505.89x = 112,478.13 × 45,695.97
  4. Step 4: Simplify right side
    81,505.89x = 5,139,797,254.14
  5. Step 5: Solve for x
    x = 5,139,797,254.14/81,505.89
  6. Step 6: Final answer
    x = 63,060.44

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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.