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Finding the Fourth Proportional to 170,775.60, 256,236.30 and 81,983.40

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Solution

The fourth proportional to 170,775.60, 256,236.30 and 81,983.40 is: 123,010.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,775.60 : 256,236.30 = 81,983.40 : x
  2. Step 2: Convert to fraction form
    170,775.60/256,236.30 = 81,983.40/x
  3. Step 3: Cross multiply
    170,775.60x = 256,236.30 × 81,983.40
  4. Step 4: Simplify right side
    170,775.60x = 21,007,123,077.42
  5. Step 5: Solve for x
    x = 21,007,123,077.42/170,775.60
  6. Step 6: Final answer
    x = 123,010.10

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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.