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Finding the Fourth Proportional to 218,305.10, 326,801.55 and 129,512.90

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Solution

The fourth proportional to 218,305.10, 326,801.55 and 129,512.90 is: 193,880.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,305.10 : 326,801.55 = 129,512.90 : x
  2. Step 2: Convert to fraction form
    218,305.10/326,801.55 = 129,512.90/x
  3. Step 3: Cross multiply
    218,305.10x = 326,801.55 × 129,512.90
  4. Step 4: Simplify right side
    218,305.10x = 42,325,016,465.00
  5. Step 5: Solve for x
    x = 42,325,016,465.00/218,305.10
  6. Step 6: Final answer
    x = 193,880.11

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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.