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Finding the Fourth Proportional to 217,817.80, 326,726.70 and 129,025.60

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Solution

The fourth proportional to 217,817.80, 326,726.70 and 129,025.60 is: 193,538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,817.80 : 326,726.70 = 129,025.60 : x
  2. Step 2: Convert to fraction form
    217,817.80/326,726.70 = 129,025.60/x
  3. Step 3: Cross multiply
    217,817.80x = 326,726.70 × 129,025.60
  4. Step 4: Simplify right side
    217,817.80x = 42,156,108,503.52
  5. Step 5: Solve for x
    x = 42,156,108,503.52/217,817.80
  6. Step 6: Final answer
    x = 193,538.40

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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.