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Finding the Fourth Proportional to 84,602.80, 126,904.20 and 74,761.30

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Solution

The fourth proportional to 84,602.80, 126,904.20 and 74,761.30 is: 112,141.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,602.80 : 126,904.20 = 74,761.30 : x
  2. Step 2: Convert to fraction form
    84,602.80/126,904.20 = 74,761.30/x
  3. Step 3: Cross multiply
    84,602.80x = 126,904.20 × 74,761.30
  4. Step 4: Simplify right side
    84,602.80x = 9,487,522,967.46
  5. Step 5: Solve for x
    x = 9,487,522,967.46/84,602.80
  6. Step 6: Final answer
    x = 112,141.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.