Home / 123,853.20-170,988.35-81,534.75

Finding the Fourth Proportional to 123,853.20, 170,988.35 and 81,534.75

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Solution

The fourth proportional to 123,853.20, 170,988.35 and 81,534.75 is: 112,564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,853.20 : 170,988.35 = 81,534.75 : x
  2. Step 2: Convert to fraction form
    123,853.20/170,988.35 = 81,534.75/x
  3. Step 3: Cross multiply
    123,853.20x = 170,988.35 × 81,534.75
  4. Step 4: Simplify right side
    123,853.20x = 13,941,491,962.49
  5. Step 5: Solve for x
    x = 13,941,491,962.49/123,853.20
  6. Step 6: Final answer
    x = 112,564.65

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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.