Home / 78,236.46-117,074.34-67,742.70

Finding the Fourth Proportional to 78,236.46, 117,074.34 and 67,742.70

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Solution

The fourth proportional to 78,236.46, 117,074.34 and 67,742.70 is: 101,371.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,236.46 : 117,074.34 = 67,742.70 : x
  2. Step 2: Convert to fraction form
    78,236.46/117,074.34 = 67,742.70/x
  3. Step 3: Cross multiply
    78,236.46x = 117,074.34 × 67,742.70
  4. Step 4: Simplify right side
    78,236.46x = 7,930,931,892.32
  5. Step 5: Solve for x
    x = 7,930,931,892.32/78,236.46
  6. Step 6: Final answer
    x = 101,371.30

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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.