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Finding the Fourth Proportional to 170,139.86, 255,084.56 and 57,789.87

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Solution

The fourth proportional to 170,139.86, 255,084.56 and 57,789.87 is: 86,642.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,139.86 : 255,084.56 = 57,789.87 : x
  2. Step 2: Convert to fraction form
    170,139.86/255,084.56 = 57,789.87/x
  3. Step 3: Cross multiply
    170,139.86x = 255,084.56 × 57,789.87
  4. Step 4: Simplify right side
    170,139.86x = 14,741,302,532.60
  5. Step 5: Solve for x
    x = 14,741,302,532.60/170,139.86
  6. Step 6: Final answer
    x = 86,642.26

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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.