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Finding the Fourth Proportional to 361,937.80, 542,787.80 and 121,987.32

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Solution

The fourth proportional to 361,937.80, 542,787.80 and 121,987.32 is: 182,940.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,937.80 : 542,787.80 = 121,987.32 : x
  2. Step 2: Convert to fraction form
    361,937.80/542,787.80 = 121,987.32/x
  3. Step 3: Cross multiply
    361,937.80x = 542,787.80 × 121,987.32
  4. Step 4: Simplify right side
    361,937.80x = 66,213,229,050.70
  5. Step 5: Solve for x
    x = 66,213,229,050.70/361,937.80
  6. Step 6: Final answer
    x = 182,940.91

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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.