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Finding the Fourth Proportional to 170,138.51, 255,245.90 and 51,819.11

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Solution

The fourth proportional to 170,138.51, 255,245.90 and 51,819.11 is: 77,740.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,138.51 : 255,245.90 = 51,819.11 : x
  2. Step 2: Convert to fraction form
    170,138.51/255,245.90 = 51,819.11/x
  3. Step 3: Cross multiply
    170,138.51x = 255,245.90 × 51,819.11
  4. Step 4: Simplify right side
    170,138.51x = 13,226,613,833.82
  5. Step 5: Solve for x
    x = 13,226,613,833.82/170,138.51
  6. Step 6: Final answer
    x = 77,740.27

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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.