Home / 129,747.88-178,984.08-112,713.88

Finding the Fourth Proportional to 129,747.88, 178,984.08 and 112,713.88

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Solution

The fourth proportional to 129,747.88, 178,984.08 and 112,713.88 is: 155,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,747.88 : 178,984.08 = 112,713.88 : x
  2. Step 2: Convert to fraction form
    129,747.88/178,984.08 = 112,713.88/x
  3. Step 3: Cross multiply
    129,747.88x = 178,984.08 × 112,713.88
  4. Step 4: Simplify right side
    129,747.88x = 20,173,990,003.17
  5. Step 5: Solve for x
    x = 20,173,990,003.17/129,747.88
  6. Step 6: Final answer
    x = 155,486.09

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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.