Home / 129,645.20-194,662.20-90,376.40

Finding the Fourth Proportional to 129,645.20, 194,662.20 and 90,376.40

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Solution

The fourth proportional to 129,645.20, 194,662.20 and 90,376.40 is: 135,700.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,645.20 : 194,662.20 = 90,376.40 : x
  2. Step 2: Convert to fraction form
    129,645.20/194,662.20 = 90,376.40/x
  3. Step 3: Cross multiply
    129,645.20x = 194,662.20 × 90,376.40
  4. Step 4: Simplify right side
    129,645.20x = 17,592,868,852.08
  5. Step 5: Solve for x
    x = 17,592,868,852.08/129,645.20
  6. Step 6: Final answer
    x = 135,700.12

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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.