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Finding the Fourth Proportional to 79,309.40, 109,456.11 and 47,478.29

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Solution

The fourth proportional to 79,309.40, 109,456.11 and 47,478.29 is: 65,525.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,309.40 : 109,456.11 = 47,478.29 : x
  2. Step 2: Convert to fraction form
    79,309.40/109,456.11 = 47,478.29/x
  3. Step 3: Cross multiply
    79,309.40x = 109,456.11 × 47,478.29
  4. Step 4: Simplify right side
    79,309.40x = 5,196,788,385.57
  5. Step 5: Solve for x
    x = 5,196,788,385.57/79,309.40
  6. Step 6: Final answer
    x = 65,525.51

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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.