Home / 129,789.36-179,103.51-72,425.57

Finding the Fourth Proportional to 129,789.36, 179,103.51 and 72,425.57

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Solution

The fourth proportional to 129,789.36, 179,103.51 and 72,425.57 is: 99,944.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.36 : 179,103.51 = 72,425.57 : x
  2. Step 2: Convert to fraction form
    129,789.36/179,103.51 = 72,425.57/x
  3. Step 3: Cross multiply
    129,789.36x = 179,103.51 × 72,425.57
  4. Step 4: Simplify right side
    129,789.36x = 12,971,672,905.23
  5. Step 5: Solve for x
    x = 12,971,672,905.23/129,789.36
  6. Step 6: Final answer
    x = 99,944.04

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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.