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Finding the Fourth Proportional to 74,918, 103,387.92 and 41,384

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Solution

The fourth proportional to 74,918, 103,387.92 and 41,384 is: 57,110.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,918 : 103,387.92 = 41,384 : x
  2. Step 2: Convert to fraction form
    74,918/103,387.92 = 41,384/x
  3. Step 3: Cross multiply
    74,918x = 103,387.92 × 41,384
  4. Step 4: Simplify right side
    74,918x = 4,278,605,681.28
  5. Step 5: Solve for x
    x = 4,278,605,681.28/74,918
  6. Step 6: Final answer
    x = 57,110.52

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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.