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Finding the Fourth Proportional to 79,319.78, 118,821.04 and 47,712.40

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Solution

The fourth proportional to 79,319.78, 118,821.04 and 47,712.40 is: 71,473.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,319.78 : 118,821.04 = 47,712.40 : x
  2. Step 2: Convert to fraction form
    79,319.78/118,821.04 = 47,712.40/x
  3. Step 3: Cross multiply
    79,319.78x = 118,821.04 × 47,712.40
  4. Step 4: Simplify right side
    79,319.78x = 5,669,236,988.90
  5. Step 5: Solve for x
    x = 5,669,236,988.90/79,319.78
  6. Step 6: Final answer
    x = 71,473.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.