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Finding the Fourth Proportional to 170,615.10, 255,922.62 and 91,620.66

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Solution

The fourth proportional to 170,615.10, 255,922.62 and 91,620.66 is: 137,430.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,615.10 : 255,922.62 = 91,620.66 : x
  2. Step 2: Convert to fraction form
    170,615.10/255,922.62 = 91,620.66/x
  3. Step 3: Cross multiply
    170,615.10x = 255,922.62 × 91,620.66
  4. Step 4: Simplify right side
    170,615.10x = 23,447,799,353.33
  5. Step 5: Solve for x
    x = 23,447,799,353.33/170,615.10
  6. Step 6: Final answer
    x = 137,430.97

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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.