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Finding the Fourth Proportional to 122,338.80, 183,044.52 and 72,445.68

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Solution

The fourth proportional to 122,338.80, 183,044.52 and 72,445.68 is: 108,393.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,338.80 : 183,044.52 = 72,445.68 : x
  2. Step 2: Convert to fraction form
    122,338.80/183,044.52 = 72,445.68/x
  3. Step 3: Cross multiply
    122,338.80x = 183,044.52 × 72,445.68
  4. Step 4: Simplify right side
    122,338.80x = 13,260,784,721.67
  5. Step 5: Solve for x
    x = 13,260,784,721.67/122,338.80
  6. Step 6: Final answer
    x = 108,393.94

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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.