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Finding the Fourth Proportional to 78,691.88, 108,585.64 and 48,049.56

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Solution

The fourth proportional to 78,691.88, 108,585.64 and 48,049.56 is: 66,302.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.88 : 108,585.64 = 48,049.56 : x
  2. Step 2: Convert to fraction form
    78,691.88/108,585.64 = 48,049.56/x
  3. Step 3: Cross multiply
    78,691.88x = 108,585.64 × 48,049.56
  4. Step 4: Simplify right side
    78,691.88x = 5,217,492,224.32
  5. Step 5: Solve for x
    x = 5,217,492,224.32/78,691.88
  6. Step 6: Final answer
    x = 66,302.80

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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.