Home / 217,542.72-326,275.16-138,421.92

Finding the Fourth Proportional to 217,542.72, 326,275.16 and 138,421.92

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Solution

The fourth proportional to 217,542.72, 326,275.16 and 138,421.92 is: 207,608.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,542.72 : 326,275.16 = 138,421.92 : x
  2. Step 2: Convert to fraction form
    217,542.72/326,275.16 = 138,421.92/x
  3. Step 3: Cross multiply
    217,542.72x = 326,275.16 × 138,421.92
  4. Step 4: Simplify right side
    217,542.72x = 45,163,633,403.40
  5. Step 5: Solve for x
    x = 45,163,633,403.40/217,542.72
  6. Step 6: Final answer
    x = 207,608.11

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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.