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Finding the Fourth Proportional to 170,655.75, 255,640.92 and 85,008.64

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Solution

The fourth proportional to 170,655.75, 255,640.92 and 85,008.64 is: 127,342.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,655.75 : 255,640.92 = 85,008.64 : x
  2. Step 2: Convert to fraction form
    170,655.75/255,640.92 = 85,008.64/x
  3. Step 3: Cross multiply
    170,655.75x = 255,640.92 × 85,008.64
  4. Step 4: Simplify right side
    170,655.75x = 21,731,686,937.55
  5. Step 5: Solve for x
    x = 21,731,686,937.55/170,655.75
  6. Step 6: Final answer
    x = 127,342.25

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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.