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Finding the Fourth Proportional to 128,037.56, 192,087.49 and 42,648.20

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Solution

The fourth proportional to 128,037.56, 192,087.49 and 42,648.20 is: 63,982.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,037.56 : 192,087.49 = 42,648.20 : x
  2. Step 2: Convert to fraction form
    128,037.56/192,087.49 = 42,648.20/x
  3. Step 3: Cross multiply
    128,037.56x = 192,087.49 × 42,648.20
  4. Step 4: Simplify right side
    128,037.56x = 8,192,185,691.02
  5. Step 5: Solve for x
    x = 8,192,185,691.02/128,037.56
  6. Step 6: Final answer
    x = 63,982.68

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1.5x scale

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.