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Finding the Fourth Proportional to 138,159.54, 207,239.30 and 38,319.73

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Solution

The fourth proportional to 138,159.54, 207,239.30 and 38,319.73 is: 57,479.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,159.54 : 207,239.30 = 38,319.73 : x
  2. Step 2: Convert to fraction form
    138,159.54/207,239.30 = 38,319.73/x
  3. Step 3: Cross multiply
    138,159.54x = 207,239.30 × 38,319.73
  4. Step 4: Simplify right side
    138,159.54x = 7,941,354,021.39
  5. Step 5: Solve for x
    x = 7,941,354,021.39/138,159.54
  6. Step 6: Final answer
    x = 57,479.59

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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.