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Finding the Fourth Proportional to 81,557.80, 122,348.88 and 28,962.88

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Solution

The fourth proportional to 81,557.80, 122,348.88 and 28,962.88 is: 43,448.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,557.80 : 122,348.88 = 28,962.88 : x
  2. Step 2: Convert to fraction form
    81,557.80/122,348.88 = 28,962.88/x
  3. Step 3: Cross multiply
    81,557.80x = 122,348.88 × 28,962.88
  4. Step 4: Simplify right side
    81,557.80x = 3,543,575,929.57
  5. Step 5: Solve for x
    x = 3,543,575,929.57/81,557.80
  6. Step 6: Final answer
    x = 43,448.65

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1.5x scale

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.