Home / 76,876.29-115,318.53-72,669.05

Finding the Fourth Proportional to 76,876.29, 115,318.53 and 72,669.05

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Solution

The fourth proportional to 76,876.29, 115,318.53 and 72,669.05 is: 109,007.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,876.29 : 115,318.53 = 72,669.05 : x
  2. Step 2: Convert to fraction form
    76,876.29/115,318.53 = 72,669.05/x
  3. Step 3: Cross multiply
    76,876.29x = 115,318.53 × 72,669.05
  4. Step 4: Simplify right side
    76,876.29x = 8,380,087,082.56
  5. Step 5: Solve for x
    x = 8,380,087,082.56/76,876.29
  6. Step 6: Final answer
    x = 109,007.44

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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.