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Finding the Fourth Proportional to 128,280.54, 177,027.42 and 71,691.92

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Solution

The fourth proportional to 128,280.54, 177,027.42 and 71,691.92 is: 98,935.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280.54 : 177,027.42 = 71,691.92 : x
  2. Step 2: Convert to fraction form
    128,280.54/177,027.42 = 71,691.92/x
  3. Step 3: Cross multiply
    128,280.54x = 177,027.42 × 71,691.92
  4. Step 4: Simplify right side
    128,280.54x = 12,691,435,632.45
  5. Step 5: Solve for x
    x = 12,691,435,632.45/128,280.54
  6. Step 6: Final answer
    x = 98,935.00

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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.