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Finding the Fourth Proportional to 81,718.27, 112,510.52 and 69,733.51

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Solution

The fourth proportional to 81,718.27, 112,510.52 and 69,733.51 is: 96,009.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,718.27 : 112,510.52 = 69,733.51 : x
  2. Step 2: Convert to fraction form
    81,718.27/112,510.52 = 69,733.51/x
  3. Step 3: Cross multiply
    81,718.27x = 112,510.52 × 69,733.51
  4. Step 4: Simplify right side
    81,718.27x = 7,845,753,103.08
  5. Step 5: Solve for x
    x = 7,845,753,103.08/81,718.27
  6. Step 6: Final answer
    x = 96,009.78

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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.