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Finding the Fourth Proportional to 81,392.39, 122,070.14 and 28,801.88

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Solution

The fourth proportional to 81,392.39, 122,070.14 and 28,801.88 is: 43,196.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,392.39 : 122,070.14 = 28,801.88 : x
  2. Step 2: Convert to fraction form
    81,392.39/122,070.14 = 28,801.88/x
  3. Step 3: Cross multiply
    81,392.39x = 122,070.14 × 28,801.88
  4. Step 4: Simplify right side
    81,392.39x = 3,515,849,335.27
  5. Step 5: Solve for x
    x = 3,515,849,335.27/81,392.39
  6. Step 6: Final answer
    x = 43,196.29

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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.