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Finding the Fourth Proportional to 71,630.10, 98,851.31 and 39,364.48

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Solution

The fourth proportional to 71,630.10, 98,851.31 and 39,364.48 is: 54,323.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,630.10 : 98,851.31 = 39,364.48 : x
  2. Step 2: Convert to fraction form
    71,630.10/98,851.31 = 39,364.48/x
  3. Step 3: Cross multiply
    71,630.10x = 98,851.31 × 39,364.48
  4. Step 4: Simplify right side
    71,630.10x = 3,891,230,415.47
  5. Step 5: Solve for x
    x = 3,891,230,415.47/71,630.10
  6. Step 6: Final answer
    x = 54,323.96

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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.