Home / 129,021.16-178,049.22-72,450.76

Finding the Fourth Proportional to 129,021.16, 178,049.22 and 72,450.76

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Solution

The fourth proportional to 129,021.16, 178,049.22 and 72,450.76 is: 99,982.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,021.16 : 178,049.22 = 72,450.76 : x
  2. Step 2: Convert to fraction form
    129,021.16/178,049.22 = 72,450.76/x
  3. Step 3: Cross multiply
    129,021.16x = 178,049.22 × 72,450.76
  4. Step 4: Simplify right side
    129,021.16x = 12,899,801,306.41
  5. Step 5: Solve for x
    x = 12,899,801,306.41/129,021.16
  6. Step 6: Final answer
    x = 99,982.06

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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.