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Finding the Fourth Proportional to 170,139, 255,189.06 and 45,489.72

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Solution

The fourth proportional to 170,139, 255,189.06 and 45,489.72 is: 68,229.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,139 : 255,189.06 = 45,489.72 : x
  2. Step 2: Convert to fraction form
    170,139/255,189.06 = 45,489.72/x
  3. Step 3: Cross multiply
    170,139x = 255,189.06 × 45,489.72
  4. Step 4: Simplify right side
    170,139x = 11,608,478,886.46
  5. Step 5: Solve for x
    x = 11,608,478,886.46/170,139
  6. Step 6: Final answer
    x = 68,229.38

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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.