Home / 76,815.90-115,223.85-71,567.10

Finding the Fourth Proportional to 76,815.90, 115,223.85 and 71,567.10

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Solution

The fourth proportional to 76,815.90, 115,223.85 and 71,567.10 is: 107,350.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,815.90 : 115,223.85 = 71,567.10 : x
  2. Step 2: Convert to fraction form
    76,815.90/115,223.85 = 71,567.10/x
  3. Step 3: Cross multiply
    76,815.90x = 115,223.85 × 71,567.10
  4. Step 4: Simplify right side
    76,815.90x = 8,246,236,795.34
  5. Step 5: Solve for x
    x = 8,246,236,795.34/76,815.90
  6. Step 6: Final answer
    x = 107,350.65

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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.