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Finding the Fourth Proportional to 128,444.94, 177,249.62 and 71,086.68

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Solution

The fourth proportional to 128,444.94, 177,249.62 and 71,086.68 is: 98,097.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,444.94 : 177,249.62 = 71,086.68 : x
  2. Step 2: Convert to fraction form
    128,444.94/177,249.62 = 71,086.68/x
  3. Step 3: Cross multiply
    128,444.94x = 177,249.62 × 71,086.68
  4. Step 4: Simplify right side
    128,444.94x = 12,600,087,194.78
  5. Step 5: Solve for x
    x = 12,600,087,194.78/128,444.94
  6. Step 6: Final answer
    x = 98,097.19

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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.