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Finding the Fourth Proportional to 81,718.68, 112,726.26 and 75,938.93

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Solution

The fourth proportional to 81,718.68, 112,726.26 and 75,938.93 is: 104,753.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,718.68 : 112,726.26 = 75,938.93 : x
  2. Step 2: Convert to fraction form
    81,718.68/112,726.26 = 75,938.93/x
  3. Step 3: Cross multiply
    81,718.68x = 112,726.26 × 75,938.93
  4. Step 4: Simplify right side
    81,718.68x = 8,560,311,567.30
  5. Step 5: Solve for x
    x = 8,560,311,567.30/81,718.68
  6. Step 6: Final answer
    x = 104,753.42

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1.5x scale

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.