Home / 129,988.40-179,380.76-72,624.20

Finding the Fourth Proportional to 129,988.40, 179,380.76 and 72,624.20

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Solution

The fourth proportional to 129,988.40, 179,380.76 and 72,624.20 is: 100,219.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,988.40 : 179,380.76 = 72,624.20 : x
  2. Step 2: Convert to fraction form
    129,988.40/179,380.76 = 72,624.20/x
  3. Step 3: Cross multiply
    129,988.40x = 179,380.76 × 72,624.20
  4. Step 4: Simplify right side
    129,988.40x = 13,027,382,930.37
  5. Step 5: Solve for x
    x = 13,027,382,930.37/129,988.40
  6. Step 6: Final answer
    x = 100,219.58

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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.