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Finding the Fourth Proportional to 81,711.99, 112,765.46 and 45,901.22

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Solution

The fourth proportional to 81,711.99, 112,765.46 and 45,901.22 is: 63,345.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,711.99 : 112,765.46 = 45,901.22 : x
  2. Step 2: Convert to fraction form
    81,711.99/112,765.46 = 45,901.22/x
  3. Step 3: Cross multiply
    81,711.99x = 112,765.46 × 45,901.22
  4. Step 4: Simplify right side
    81,711.99x = 5,176,071,394.53
  5. Step 5: Solve for x
    x = 5,176,071,394.53/81,711.99
  6. Step 6: Final answer
    x = 63,345.31

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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.