Home / 78,548.60-108,398.18-42,738.64

Finding the Fourth Proportional to 78,548.60, 108,398.18 and 42,738.64

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Solution

The fourth proportional to 78,548.60, 108,398.18 and 42,738.64 is: 58,979.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,548.60 : 108,398.18 = 42,738.64 : x
  2. Step 2: Convert to fraction form
    78,548.60/108,398.18 = 42,738.64/x
  3. Step 3: Cross multiply
    78,548.60x = 108,398.18 × 42,738.64
  4. Step 4: Simplify right side
    78,548.60x = 4,632,790,627.53
  5. Step 5: Solve for x
    x = 4,632,790,627.53/78,548.60
  6. Step 6: Final answer
    x = 58,979.92

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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.