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Finding the Fourth Proportional to 128,625.92, 177,499.62 and 71,262.88

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Solution

The fourth proportional to 128,625.92, 177,499.62 and 71,262.88 is: 98,340.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,625.92 : 177,499.62 = 71,262.88 : x
  2. Step 2: Convert to fraction form
    128,625.92/177,499.62 = 71,262.88/x
  3. Step 3: Cross multiply
    128,625.92x = 177,499.62 × 71,262.88
  4. Step 4: Simplify right side
    128,625.92x = 12,649,134,120.11
  5. Step 5: Solve for x
    x = 12,649,134,120.11/128,625.92
  6. Step 6: Final answer
    x = 98,340.48

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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.