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Finding the Fourth Proportional to 81,675.80, 112,711.28 and 45,376.46

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Solution

The fourth proportional to 81,675.80, 112,711.28 and 45,376.46 is: 62,618.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,675.80 : 112,711.28 = 45,376.46 : x
  2. Step 2: Convert to fraction form
    81,675.80/112,711.28 = 45,376.46/x
  3. Step 3: Cross multiply
    81,675.80x = 112,711.28 × 45,376.46
  4. Step 4: Simplify right side
    81,675.80x = 5,114,438,888.47
  5. Step 5: Solve for x
    x = 5,114,438,888.47/81,675.80
  6. Step 6: Final answer
    x = 62,618.78

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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.