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Finding the Fourth Proportional to 207,883.78, 286,879.64 and 112,390.45

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Solution

The fourth proportional to 207,883.78, 286,879.64 and 112,390.45 is: 155,098.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,883.78 : 286,879.64 = 112,390.45 : x
  2. Step 2: Convert to fraction form
    207,883.78/286,879.64 = 112,390.45/x
  3. Step 3: Cross multiply
    207,883.78x = 286,879.64 × 112,390.45
  4. Step 4: Simplify right side
    207,883.78x = 32,242,530,556.29
  5. Step 5: Solve for x
    x = 32,242,530,556.29/207,883.78
  6. Step 6: Final answer
    x = 155,098.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.