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Finding the Fourth Proportional to 170,138.78, 255,246.90 and 51,819.35

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Solution

The fourth proportional to 170,138.78, 255,246.90 and 51,819.35 is: 77,740.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,138.78 : 255,246.90 = 51,819.35 : x
  2. Step 2: Convert to fraction form
    170,138.78/255,246.90 = 51,819.35/x
  3. Step 3: Cross multiply
    170,138.78x = 255,246.90 × 51,819.35
  4. Step 4: Simplify right side
    170,138.78x = 13,226,728,447.52
  5. Step 5: Solve for x
    x = 13,226,728,447.52/170,138.78
  6. Step 6: Final answer
    x = 77,740.82

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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.