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Finding the Fourth Proportional to 217,862.60, 326,729.10 and 84,666.20

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Solution

The fourth proportional to 217,862.60, 326,729.10 and 84,666.20 is: 126,974.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,862.60 : 326,729.10 = 84,666.20 : x
  2. Step 2: Convert to fraction form
    217,862.60/326,729.10 = 84,666.20/x
  3. Step 3: Cross multiply
    217,862.60x = 326,729.10 × 84,666.20
  4. Step 4: Simplify right side
    217,862.60x = 27,662,911,326.42
  5. Step 5: Solve for x
    x = 27,662,911,326.42/217,862.60
  6. Step 6: Final answer
    x = 126,974.12

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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.