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Finding the Fourth Proportional to 169,836.60, 254,754.90 and 85,855.80

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Solution

The fourth proportional to 169,836.60, 254,754.90 and 85,855.80 is: 128,783.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,836.60 : 254,754.90 = 85,855.80 : x
  2. Step 2: Convert to fraction form
    169,836.60/254,754.90 = 85,855.80/x
  3. Step 3: Cross multiply
    169,836.60x = 254,754.90 × 85,855.80
  4. Step 4: Simplify right side
    169,836.60x = 21,872,185,743.42
  5. Step 5: Solve for x
    x = 21,872,185,743.42/169,836.60
  6. Step 6: Final answer
    x = 128,783.70

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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.