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Finding the Fourth Proportional to 71,596.86, 98,806.68 and 39,768.72

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Solution

The fourth proportional to 71,596.86, 98,806.68 and 39,768.72 is: 54,882.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,596.86 : 98,806.68 = 39,768.72 : x
  2. Step 2: Convert to fraction form
    71,596.86/98,806.68 = 39,768.72/x
  3. Step 3: Cross multiply
    71,596.86x = 98,806.68 × 39,768.72
  4. Step 4: Simplify right side
    71,596.86x = 3,929,415,191.05
  5. Step 5: Solve for x
    x = 3,929,415,191.05/71,596.86
  6. Step 6: Final answer
    x = 54,882.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.