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Finding the Fourth Proportional to 170,660.40, 255,664.20 and 91,748.40

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Solution

The fourth proportional to 170,660.40, 255,664.20 and 91,748.40 is: 137,447.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,660.40 : 255,664.20 = 91,748.40 : x
  2. Step 2: Convert to fraction form
    170,660.40/255,664.20 = 91,748.40/x
  3. Step 3: Cross multiply
    170,660.40x = 255,664.20 × 91,748.40
  4. Step 4: Simplify right side
    170,660.40x = 23,456,781,287.28
  5. Step 5: Solve for x
    x = 23,456,781,287.28/170,660.40
  6. Step 6: Final answer
    x = 137,447.12

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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.