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Finding the Fourth Proportional to 172,958.60, 258,968.90 and 89,677.64

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Solution

The fourth proportional to 172,958.60, 258,968.90 and 89,677.64 is: 134,273.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,958.60 : 258,968.90 = 89,677.64 : x
  2. Step 2: Convert to fraction form
    172,958.60/258,968.90 = 89,677.64/x
  3. Step 3: Cross multiply
    172,958.60x = 258,968.90 × 89,677.64
  4. Step 4: Simplify right side
    172,958.60x = 23,223,719,785.40
  5. Step 5: Solve for x
    x = 23,223,719,785.40/172,958.60
  6. Step 6: Final answer
    x = 134,273.29

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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.