Home / 129,980.20-195,164.70-90,711.40

Finding the Fourth Proportional to 129,980.20, 195,164.70 and 90,711.40

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Solution

The fourth proportional to 129,980.20, 195,164.70 and 90,711.40 is: 136,202.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,980.20 : 195,164.70 = 90,711.40 : x
  2. Step 2: Convert to fraction form
    129,980.20/195,164.70 = 90,711.40/x
  3. Step 3: Cross multiply
    129,980.20x = 195,164.70 × 90,711.40
  4. Step 4: Simplify right side
    129,980.20x = 17,703,663,167.58
  5. Step 5: Solve for x
    x = 17,703,663,167.58/129,980.20
  6. Step 6: Final answer
    x = 136,202.77

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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.