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Finding the Fourth Proportional to 127,082.56, 175,371.20 and 78,671.60

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Solution

The fourth proportional to 127,082.56, 175,371.20 and 78,671.60 is: 108,565.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,082.56 : 175,371.20 = 78,671.60 : x
  2. Step 2: Convert to fraction form
    127,082.56/175,371.20 = 78,671.60/x
  3. Step 3: Cross multiply
    127,082.56x = 175,371.20 × 78,671.60
  4. Step 4: Simplify right side
    127,082.56x = 13,796,732,897.92
  5. Step 5: Solve for x
    x = 13,796,732,897.92/127,082.56
  6. Step 6: Final answer
    x = 108,565.12

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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.