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Finding the Fourth Proportional to 170,707.68, 255,846.48 and 81,888.48

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Solution

The fourth proportional to 170,707.68, 255,846.48 and 81,888.48 is: 122,729.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,707.68 : 255,846.48 = 81,888.48 : x
  2. Step 2: Convert to fraction form
    170,707.68/255,846.48 = 81,888.48/x
  3. Step 3: Cross multiply
    170,707.68x = 255,846.48 × 81,888.48
  4. Step 4: Simplify right side
    170,707.68x = 20,950,879,360.55
  5. Step 5: Solve for x
    x = 20,950,879,360.55/170,707.68
  6. Step 6: Final answer
    x = 122,729.57

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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.