Home / 83,678.18-115,520.92-64,515.90

Finding the Fourth Proportional to 83,678.18, 115,520.92 and 64,515.90

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Solution

The fourth proportional to 83,678.18, 115,520.92 and 64,515.90 is: 89,066.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,678.18 : 115,520.92 = 64,515.90 : x
  2. Step 2: Convert to fraction form
    83,678.18/115,520.92 = 64,515.90/x
  3. Step 3: Cross multiply
    83,678.18x = 115,520.92 × 64,515.90
  4. Step 4: Simplify right side
    83,678.18x = 7,452,936,394.54
  5. Step 5: Solve for x
    x = 7,452,936,394.54/83,678.18
  6. Step 6: Final answer
    x = 89,066.67

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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.