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Finding the Fourth Proportional to 170,826.80, 256,499.40 and 131,428.40

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Solution

The fourth proportional to 170,826.80, 256,499.40 and 131,428.40 is: 197,342.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,826.80 : 256,499.40 = 131,428.40 : x
  2. Step 2: Convert to fraction form
    170,826.80/256,499.40 = 131,428.40/x
  3. Step 3: Cross multiply
    170,826.80x = 256,499.40 × 131,428.40
  4. Step 4: Simplify right side
    170,826.80x = 33,711,305,742.96
  5. Step 5: Solve for x
    x = 33,711,305,742.96/170,826.80
  6. Step 6: Final answer
    x = 197,342.02

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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.