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Finding the Fourth Proportional to 126,988.71, 175,249.96 and 75,991.74

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Solution

The fourth proportional to 126,988.71, 175,249.96 and 75,991.74 is: 104,871.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,988.71 : 175,249.96 = 75,991.74 : x
  2. Step 2: Convert to fraction form
    126,988.71/175,249.96 = 75,991.74/x
  3. Step 3: Cross multiply
    126,988.71x = 175,249.96 × 75,991.74
  4. Step 4: Simplify right side
    126,988.71x = 13,317,549,961.40
  5. Step 5: Solve for x
    x = 13,317,549,961.40/126,988.71
  6. Step 6: Final answer
    x = 104,871.92

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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.