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Finding the Fourth Proportional to 79,312.78, 109,454.70 and 43,504.30

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Solution

The fourth proportional to 79,312.78, 109,454.70 and 43,504.30 is: 60,037.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,312.78 : 109,454.70 = 43,504.30 : x
  2. Step 2: Convert to fraction form
    79,312.78/109,454.70 = 43,504.30/x
  3. Step 3: Cross multiply
    79,312.78x = 109,454.70 × 43,504.30
  4. Step 4: Simplify right side
    79,312.78x = 4,761,750,105.21
  5. Step 5: Solve for x
    x = 4,761,750,105.21/79,312.78
  6. Step 6: Final answer
    x = 60,037.61

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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.