Home / 217,176.30-325,764.45-138,638.70

Finding the Fourth Proportional to 217,176.30, 325,764.45 and 138,638.70

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Solution

The fourth proportional to 217,176.30, 325,764.45 and 138,638.70 is: 207,958.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,176.30 : 325,764.45 = 138,638.70 : x
  2. Step 2: Convert to fraction form
    217,176.30/325,764.45 = 138,638.70/x
  3. Step 3: Cross multiply
    217,176.30x = 325,764.45 × 138,638.70
  4. Step 4: Simplify right side
    217,176.30x = 45,163,559,854.22
  5. Step 5: Solve for x
    x = 45,163,559,854.22/217,176.30
  6. Step 6: Final answer
    x = 207,958.05

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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.