Home / 76,961.10-115,441.65-72,003.90

Finding the Fourth Proportional to 76,961.10, 115,441.65 and 72,003.90

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Solution

The fourth proportional to 76,961.10, 115,441.65 and 72,003.90 is: 108,005.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,961.10 : 115,441.65 = 72,003.90 : x
  2. Step 2: Convert to fraction form
    76,961.10/115,441.65 = 72,003.90/x
  3. Step 3: Cross multiply
    76,961.10x = 115,441.65 × 72,003.90
  4. Step 4: Simplify right side
    76,961.10x = 8,312,249,022.44
  5. Step 5: Solve for x
    x = 8,312,249,022.44/76,961.10
  6. Step 6: Final answer
    x = 108,005.85

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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.