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Finding the Fourth Proportional to 79,368.78, 109,532.34 and 47,531.58

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Solution

The fourth proportional to 79,368.78, 109,532.34 and 47,531.58 is: 65,595.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,368.78 : 109,532.34 = 47,531.58 : x
  2. Step 2: Convert to fraction form
    79,368.78/109,532.34 = 47,531.58/x
  3. Step 3: Cross multiply
    79,368.78x = 109,532.34 × 47,531.58
  4. Step 4: Simplify right side
    79,368.78x = 5,206,245,181.30
  5. Step 5: Solve for x
    x = 5,206,245,181.30/79,368.78
  6. Step 6: Final answer
    x = 65,595.63

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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.