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Finding the Fourth Proportional to 138,188.58, 207,282.88 and 38,348.80

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Solution

The fourth proportional to 138,188.58, 207,282.88 and 38,348.80 is: 57,523.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,188.58 : 207,282.88 = 38,348.80 : x
  2. Step 2: Convert to fraction form
    138,188.58/207,282.88 = 38,348.80/x
  3. Step 3: Cross multiply
    138,188.58x = 207,282.88 × 38,348.80
  4. Step 4: Simplify right side
    138,188.58x = 7,949,049,708.54
  5. Step 5: Solve for x
    x = 7,949,049,708.54/138,188.58
  6. Step 6: Final answer
    x = 57,523.20

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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.