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Finding the Fourth Proportional to 138,601.32, 207,905.22 and 45,114.36

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Solution

The fourth proportional to 138,601.32, 207,905.22 and 45,114.36 is: 67,672.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,601.32 : 207,905.22 = 45,114.36 : x
  2. Step 2: Convert to fraction form
    138,601.32/207,905.22 = 45,114.36/x
  3. Step 3: Cross multiply
    138,601.32x = 207,905.22 × 45,114.36
  4. Step 4: Simplify right side
    138,601.32x = 9,379,510,940.96
  5. Step 5: Solve for x
    x = 9,379,510,940.96/138,601.32
  6. Step 6: Final answer
    x = 67,672.59

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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.