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Finding the Fourth Proportional to 129,703.50, 194,303.49 and 85,195.20

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Solution

The fourth proportional to 129,703.50, 194,303.49 and 85,195.20 is: 127,627.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,703.50 : 194,303.49 = 85,195.20 : x
  2. Step 2: Convert to fraction form
    129,703.50/194,303.49 = 85,195.20/x
  3. Step 3: Cross multiply
    129,703.50x = 194,303.49 × 85,195.20
  4. Step 4: Simplify right side
    129,703.50x = 16,553,724,691.25
  5. Step 5: Solve for x
    x = 16,553,724,691.25/129,703.50
  6. Step 6: Final answer
    x = 127,627.43

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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.