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Finding the Fourth Proportional to 81,348.28, 112,202.76 and 74,655.52

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Solution

The fourth proportional to 81,348.28, 112,202.76 and 74,655.52 is: 102,971.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,348.28 : 112,202.76 = 74,655.52 : x
  2. Step 2: Convert to fraction form
    81,348.28/112,202.76 = 74,655.52/x
  3. Step 3: Cross multiply
    81,348.28x = 112,202.76 × 74,655.52
  4. Step 4: Simplify right side
    81,348.28x = 8,376,555,393.24
  5. Step 5: Solve for x
    x = 8,376,555,393.24/81,348.28
  6. Step 6: Final answer
    x = 102,971.51

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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.