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Finding the Fourth Proportional to 91,309.95, 126,042.75 and 81,732.92

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Solution

The fourth proportional to 91,309.95, 126,042.75 and 81,732.92 is: 112,822.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,309.95 : 126,042.75 = 81,732.92 : x
  2. Step 2: Convert to fraction form
    91,309.95/126,042.75 = 81,732.92/x
  3. Step 3: Cross multiply
    91,309.95x = 126,042.75 × 81,732.92
  4. Step 4: Simplify right side
    91,309.95x = 10,301,841,372.12
  5. Step 5: Solve for x
    x = 10,301,841,372.12/91,309.95
  6. Step 6: Final answer
    x = 112,822.77

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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.