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Finding the Fourth Proportional to 129,424.60, 194,136.90 and 102,986.20

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Solution

The fourth proportional to 129,424.60, 194,136.90 and 102,986.20 is: 154,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,424.60 : 194,136.90 = 102,986.20 : x
  2. Step 2: Convert to fraction form
    129,424.60/194,136.90 = 102,986.20/x
  3. Step 3: Cross multiply
    129,424.60x = 194,136.90 × 102,986.20
  4. Step 4: Simplify right side
    129,424.60x = 19,993,421,610.78
  5. Step 5: Solve for x
    x = 19,993,421,610.78/129,424.60
  6. Step 6: Final answer
    x = 154,479.30

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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.