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Finding the Fourth Proportional to 170,657.90, 255,660.45 and 91,745.90

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Solution

The fourth proportional to 170,657.90, 255,660.45 and 91,745.90 is: 137,443.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,657.90 : 255,660.45 = 91,745.90 : x
  2. Step 2: Convert to fraction form
    170,657.90/255,660.45 = 91,745.90/x
  3. Step 3: Cross multiply
    170,657.90x = 255,660.45 × 91,745.90
  4. Step 4: Simplify right side
    170,657.90x = 23,455,798,079.66
  5. Step 5: Solve for x
    x = 23,455,798,079.66/170,657.90
  6. Step 6: Final answer
    x = 137,443.38

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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.