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Finding the Fourth Proportional to 126,387.84, 174,399.84 and 80,431.68

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Solution

The fourth proportional to 126,387.84, 174,399.84 and 80,431.68 is: 110,985.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,387.84 : 174,399.84 = 80,431.68 : x
  2. Step 2: Convert to fraction form
    126,387.84/174,399.84 = 80,431.68/x
  3. Step 3: Cross multiply
    126,387.84x = 174,399.84 × 80,431.68
  4. Step 4: Simplify right side
    126,387.84x = 14,027,272,122.93
  5. Step 5: Solve for x
    x = 14,027,272,122.93/126,387.84
  6. Step 6: Final answer
    x = 110,985.93

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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.