Home / 129,615.29-178,862.88-72,260.91

Finding the Fourth Proportional to 129,615.29, 178,862.88 and 72,260.91

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Solution

The fourth proportional to 129,615.29, 178,862.88 and 72,260.91 is: 99,716.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,615.29 : 178,862.88 = 72,260.91 : x
  2. Step 2: Convert to fraction form
    129,615.29/178,862.88 = 72,260.91/x
  3. Step 3: Cross multiply
    129,615.29x = 178,862.88 × 72,260.91
  4. Step 4: Simplify right side
    129,615.29x = 12,924,794,745.00
  5. Step 5: Solve for x
    x = 12,924,794,745.00/129,615.29
  6. Step 6: Final answer
    x = 99,716.59

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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.