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Finding the Fourth Proportional to 78,851.39, 108,798.67 and 45,310.91

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Solution

The fourth proportional to 78,851.39, 108,798.67 and 45,310.91 is: 62,519.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,851.39 : 108,798.67 = 45,310.91 : x
  2. Step 2: Convert to fraction form
    78,851.39/108,798.67 = 45,310.91/x
  3. Step 3: Cross multiply
    78,851.39x = 108,798.67 × 45,310.91
  4. Step 4: Simplify right side
    78,851.39x = 4,929,766,744.49
  5. Step 5: Solve for x
    x = 4,929,766,744.49/78,851.39
  6. Step 6: Final answer
    x = 62,519.72

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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.