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Finding the Fourth Proportional to 138,228.70, 207,343.06 and 68,244.70

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Solution

The fourth proportional to 138,228.70, 207,343.06 and 68,244.70 is: 102,367.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,228.70 : 207,343.06 = 68,244.70 : x
  2. Step 2: Convert to fraction form
    138,228.70/207,343.06 = 68,244.70/x
  3. Step 3: Cross multiply
    138,228.70x = 207,343.06 × 68,244.70
  4. Step 4: Simplify right side
    138,228.70x = 14,150,064,926.78
  5. Step 5: Solve for x
    x = 14,150,064,926.78/138,228.70
  6. Step 6: Final answer
    x = 102,367.05

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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.