Home / 78,614.12-108,401.28-68,451.86

Finding the Fourth Proportional to 78,614.12, 108,401.28 and 68,451.86

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Solution

The fourth proportional to 78,614.12, 108,401.28 and 68,451.86 is: 94,388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,614.12 : 108,401.28 = 68,451.86 : x
  2. Step 2: Convert to fraction form
    78,614.12/108,401.28 = 68,451.86/x
  3. Step 3: Cross multiply
    78,614.12x = 108,401.28 × 68,451.86
  4. Step 4: Simplify right side
    78,614.12x = 7,420,269,242.38
  5. Step 5: Solve for x
    x = 7,420,269,242.38/78,614.12
  6. Step 6: Final answer
    x = 94,388.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.