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Finding the Fourth Proportional to 129,870.70, 194,806.05 and 108,000.70

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Solution

The fourth proportional to 129,870.70, 194,806.05 and 108,000.70 is: 162,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,870.70 : 194,806.05 = 108,000.70 : x
  2. Step 2: Convert to fraction form
    129,870.70/194,806.05 = 108,000.70/x
  3. Step 3: Cross multiply
    129,870.70x = 194,806.05 × 108,000.70
  4. Step 4: Simplify right side
    129,870.70x = 21,039,189,764.24
  5. Step 5: Solve for x
    x = 21,039,189,764.24/129,870.70
  6. Step 6: Final answer
    x = 162,001.05

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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.