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Finding the Fourth Proportional to 74,418.40, 111,616.80 and 21,822.40

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Solution

The fourth proportional to 74,418.40, 111,616.80 and 21,822.40 is: 32,730.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,418.40 : 111,616.80 = 21,822.40 : x
  2. Step 2: Convert to fraction form
    74,418.40/111,616.80 = 21,822.40/x
  3. Step 3: Cross multiply
    74,418.40x = 111,616.80 × 21,822.40
  4. Step 4: Simplify right side
    74,418.40x = 2,435,746,456.32
  5. Step 5: Solve for x
    x = 2,435,746,456.32/74,418.40
  6. Step 6: Final answer
    x = 32,730.43

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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.