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Finding the Fourth Proportional to 78,372.64, 108,156.76 and 44,380.64

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Solution

The fourth proportional to 78,372.64, 108,156.76 and 44,380.64 is: 61,246.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.64 : 108,156.76 = 44,380.64 : x
  2. Step 2: Convert to fraction form
    78,372.64/108,156.76 = 44,380.64/x
  3. Step 3: Cross multiply
    78,372.64x = 108,156.76 × 44,380.64
  4. Step 4: Simplify right side
    78,372.64x = 4,800,066,229.13
  5. Step 5: Solve for x
    x = 4,800,066,229.13/78,372.64
  6. Step 6: Final answer
    x = 61,246.71

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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.