Home / 129,480.40-194,220.60-76,862.80

Finding the Fourth Proportional to 129,480.40, 194,220.60 and 76,862.80

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Solution

The fourth proportional to 129,480.40, 194,220.60 and 76,862.80 is: 115,294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,480.40 : 194,220.60 = 76,862.80 : x
  2. Step 2: Convert to fraction form
    129,480.40/194,220.60 = 76,862.80/x
  3. Step 3: Cross multiply
    129,480.40x = 194,220.60 × 76,862.80
  4. Step 4: Simplify right side
    129,480.40x = 14,928,339,133.68
  5. Step 5: Solve for x
    x = 14,928,339,133.68/129,480.40
  6. Step 6: Final answer
    x = 115,294.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.