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Finding the Fourth Proportional to 217,160.32, 325,630.40 and 76,899.20

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Solution

The fourth proportional to 217,160.32, 325,630.40 and 76,899.20 is: 115,309.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,160.32 : 325,630.40 = 76,899.20 : x
  2. Step 2: Convert to fraction form
    217,160.32/325,630.40 = 76,899.20/x
  3. Step 3: Cross multiply
    217,160.32x = 325,630.40 × 76,899.20
  4. Step 4: Simplify right side
    217,160.32x = 25,040,717,255.68
  5. Step 5: Solve for x
    x = 25,040,717,255.68/217,160.32
  6. Step 6: Final answer
    x = 115,309.82

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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.