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Finding the Fourth Proportional to 138,405.35, 207,608.15 and 38,568.20

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Solution

The fourth proportional to 138,405.35, 207,608.15 and 38,568.20 is: 57,852.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,405.35 : 207,608.15 = 38,568.20 : x
  2. Step 2: Convert to fraction form
    138,405.35/207,608.15 = 38,568.20/x
  3. Step 3: Cross multiply
    138,405.35x = 207,608.15 × 38,568.20
  4. Step 4: Simplify right side
    138,405.35x = 8,007,072,822.77
  5. Step 5: Solve for x
    x = 8,007,072,822.77/138,405.35
  6. Step 6: Final answer
    x = 57,852.34

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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.