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Finding the Fourth Proportional to 129,870.60, 194,805.90 and 120,247.80

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Solution

The fourth proportional to 129,870.60, 194,805.90 and 120,247.80 is: 180,371.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,870.60 : 194,805.90 = 120,247.80 : x
  2. Step 2: Convert to fraction form
    129,870.60/194,805.90 = 120,247.80/x
  3. Step 3: Cross multiply
    129,870.60x = 194,805.90 × 120,247.80
  4. Step 4: Simplify right side
    129,870.60x = 23,424,980,902.02
  5. Step 5: Solve for x
    x = 23,424,980,902.02/129,870.60
  6. Step 6: Final answer
    x = 180,371.70

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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.