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Finding the Fourth Proportional to 74,418.90, 111,617.55 and 21,822.90

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Solution

The fourth proportional to 74,418.90, 111,617.55 and 21,822.90 is: 32,731.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,418.90 : 111,617.55 = 21,822.90 : x
  2. Step 2: Convert to fraction form
    74,418.90/111,617.55 = 21,822.90/x
  3. Step 3: Cross multiply
    74,418.90x = 111,617.55 × 21,822.90
  4. Step 4: Simplify right side
    74,418.90x = 2,435,818,631.90
  5. Step 5: Solve for x
    x = 2,435,818,631.90/74,418.90
  6. Step 6: Final answer
    x = 32,731.18

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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.