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Finding the Fourth Proportional to 127,638.92, 176,134.68 and 70,275.92

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Solution

The fourth proportional to 127,638.92, 176,134.68 and 70,275.92 is: 96,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,638.92 : 176,134.68 = 70,275.92 : x
  2. Step 2: Convert to fraction form
    127,638.92/176,134.68 = 70,275.92/x
  3. Step 3: Cross multiply
    127,638.92x = 176,134.68 × 70,275.92
  4. Step 4: Simplify right side
    127,638.92x = 12,378,026,680.91
  5. Step 5: Solve for x
    x = 12,378,026,680.91/127,638.92
  6. Step 6: Final answer
    x = 96,976.90

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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.