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Finding the Fourth Proportional to 172,479.60, 258,719.40 and 83,906.10

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Solution

The fourth proportional to 172,479.60, 258,719.40 and 83,906.10 is: 125,859.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,479.60 : 258,719.40 = 83,906.10 : x
  2. Step 2: Convert to fraction form
    172,479.60/258,719.40 = 83,906.10/x
  3. Step 3: Cross multiply
    172,479.60x = 258,719.40 × 83,906.10
  4. Step 4: Simplify right side
    172,479.60x = 21,708,135,848.34
  5. Step 5: Solve for x
    x = 21,708,135,848.34/172,479.60
  6. Step 6: Final answer
    x = 125,859.15

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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.