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Finding the Fourth Proportional to 139,882.56, 209,636.19 and 76,607.52

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Solution

The fourth proportional to 139,882.56, 209,636.19 and 76,607.52 is: 114,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,882.56 : 209,636.19 = 76,607.52 : x
  2. Step 2: Convert to fraction form
    139,882.56/209,636.19 = 76,607.52/x
  3. Step 3: Cross multiply
    139,882.56x = 209,636.19 × 76,607.52
  4. Step 4: Simplify right side
    139,882.56x = 16,059,708,618.15
  5. Step 5: Solve for x
    x = 16,059,708,618.15/139,882.56
  6. Step 6: Final answer
    x = 114,808.51

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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.