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Finding the Fourth Proportional to 78,599.32, 108,435 and 48,375.52

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Solution

The fourth proportional to 78,599.32, 108,435 and 48,375.52 is: 66,738.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,599.32 : 108,435 = 48,375.52 : x
  2. Step 2: Convert to fraction form
    78,599.32/108,435 = 48,375.52/x
  3. Step 3: Cross multiply
    78,599.32x = 108,435 × 48,375.52
  4. Step 4: Simplify right side
    78,599.32x = 5,245,599,511.20
  5. Step 5: Solve for x
    x = 5,245,599,511.20/78,599.32
  6. Step 6: Final answer
    x = 66,738.48

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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.