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Finding the Fourth Proportional to 170,485.60, 255,728.40 and 75,693.52

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Solution

The fourth proportional to 170,485.60, 255,728.40 and 75,693.52 is: 113,540.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,485.60 : 255,728.40 = 75,693.52 : x
  2. Step 2: Convert to fraction form
    170,485.60/255,728.40 = 75,693.52/x
  3. Step 3: Cross multiply
    170,485.60x = 255,728.40 × 75,693.52
  4. Step 4: Simplify right side
    170,485.60x = 19,356,982,759.97
  5. Step 5: Solve for x
    x = 19,356,982,759.97/170,485.60
  6. Step 6: Final answer
    x = 113,540.28

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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.