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Finding the Fourth Proportional to 81,506.89, 112,479.51 and 45,696.97

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Solution

The fourth proportional to 81,506.89, 112,479.51 and 45,696.97 is: 63,061.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,506.89 : 112,479.51 = 45,696.97 : x
  2. Step 2: Convert to fraction form
    81,506.89/112,479.51 = 45,696.97/x
  3. Step 3: Cross multiply
    81,506.89x = 112,479.51 × 45,696.97
  4. Step 4: Simplify right side
    81,506.89x = 5,139,972,794.08
  5. Step 5: Solve for x
    x = 5,139,972,794.08/81,506.89
  6. Step 6: Final answer
    x = 63,061.82

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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.