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Finding the Fourth Proportional to 81,663.80, 112,696.11 and 45,856.13

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Solution

The fourth proportional to 81,663.80, 112,696.11 and 45,856.13 is: 63,281.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,663.80 : 112,696.11 = 45,856.13 : x
  2. Step 2: Convert to fraction form
    81,663.80/112,696.11 = 45,856.13/x
  3. Step 3: Cross multiply
    81,663.80x = 112,696.11 × 45,856.13
  4. Step 4: Simplify right side
    81,663.80x = 5,167,806,907.17
  5. Step 5: Solve for x
    x = 5,167,806,907.17/81,663.80
  6. Step 6: Final answer
    x = 63,281.49

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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.