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Finding the Fourth Proportional to 81,924.64, 122,886.88 and 25,769.68

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Solution

The fourth proportional to 81,924.64, 122,886.88 and 25,769.68 is: 38,654.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,924.64 : 122,886.88 = 25,769.68 : x
  2. Step 2: Convert to fraction form
    81,924.64/122,886.88 = 25,769.68/x
  3. Step 3: Cross multiply
    81,924.64x = 122,886.88 × 25,769.68
  4. Step 4: Simplify right side
    81,924.64x = 3,166,755,573.80
  5. Step 5: Solve for x
    x = 3,166,755,573.80/81,924.64
  6. Step 6: Final answer
    x = 38,654.49

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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.