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Finding the Fourth Proportional to 79,316.21, 109,418.65 and 47,478.96

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Solution

The fourth proportional to 79,316.21, 109,418.65 and 47,478.96 is: 65,498.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,316.21 : 109,418.65 = 47,478.96 : x
  2. Step 2: Convert to fraction form
    79,316.21/109,418.65 = 47,478.96/x
  3. Step 3: Cross multiply
    79,316.21x = 109,418.65 × 47,478.96
  4. Step 4: Simplify right side
    79,316.21x = 5,195,083,587.91
  5. Step 5: Solve for x
    x = 5,195,083,587.91/79,316.21
  6. Step 6: Final answer
    x = 65,498.38

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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.