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Finding the Fourth Proportional to 115,138.17, 172,713.42 and 36,258.54

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Solution

The fourth proportional to 115,138.17, 172,713.42 and 36,258.54 is: 54,389.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,138.17 : 172,713.42 = 36,258.54 : x
  2. Step 2: Convert to fraction form
    115,138.17/172,713.42 = 36,258.54/x
  3. Step 3: Cross multiply
    115,138.17x = 172,713.42 × 36,258.54
  4. Step 4: Simplify right side
    115,138.17x = 6,262,336,447.61
  5. Step 5: Solve for x
    x = 6,262,336,447.61/115,138.17
  6. Step 6: Final answer
    x = 54,389.75

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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.