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Finding the Fourth Proportional to 79,608.64, 109,785.36 and 49,398.88

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Solution

The fourth proportional to 79,608.64, 109,785.36 and 49,398.88 is: 68,124.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,608.64 : 109,785.36 = 49,398.88 : x
  2. Step 2: Convert to fraction form
    79,608.64/109,785.36 = 49,398.88/x
  3. Step 3: Cross multiply
    79,608.64x = 109,785.36 × 49,398.88
  4. Step 4: Simplify right side
    79,608.64x = 5,423,273,824.40
  5. Step 5: Solve for x
    x = 5,423,273,824.40/79,608.64
  6. Step 6: Final answer
    x = 68,124.19

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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.