Home / 76,875.76-115,229.40-30,077.20

Finding the Fourth Proportional to 76,875.76, 115,229.40 and 30,077.20

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Solution

The fourth proportional to 76,875.76, 115,229.40 and 30,077.20 is: 45,082.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,875.76 : 115,229.40 = 30,077.20 : x
  2. Step 2: Convert to fraction form
    76,875.76/115,229.40 = 30,077.20/x
  3. Step 3: Cross multiply
    76,875.76x = 115,229.40 × 30,077.20
  4. Step 4: Simplify right side
    76,875.76x = 3,465,777,709.68
  5. Step 5: Solve for x
    x = 3,465,777,709.68/76,875.76
  6. Step 6: Final answer
    x = 45,082.84

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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.