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Finding the Fourth Proportional to 172,874.79, 259,164.27 and 66,335.20

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Solution

The fourth proportional to 172,874.79, 259,164.27 and 66,335.20 is: 99,446.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,874.79 : 259,164.27 = 66,335.20 : x
  2. Step 2: Convert to fraction form
    172,874.79/259,164.27 = 66,335.20/x
  3. Step 3: Cross multiply
    172,874.79x = 259,164.27 × 66,335.20
  4. Step 4: Simplify right side
    172,874.79x = 17,191,712,794.36
  5. Step 5: Solve for x
    x = 17,191,712,794.36/172,874.79
  6. Step 6: Final answer
    x = 99,446.04

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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.