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Finding the Fourth Proportional to 170,658.50, 255,645.05 and 85,011.39

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Solution

The fourth proportional to 170,658.50, 255,645.05 and 85,011.39 is: 127,346.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,658.50 : 255,645.05 = 85,011.39 : x
  2. Step 2: Convert to fraction form
    170,658.50/255,645.05 = 85,011.39/x
  3. Step 3: Cross multiply
    170,658.50x = 255,645.05 × 85,011.39
  4. Step 4: Simplify right side
    170,658.50x = 21,732,740,622.06
  5. Step 5: Solve for x
    x = 21,732,740,622.06/170,658.50
  6. Step 6: Final answer
    x = 127,346.37

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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.