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Finding the Fourth Proportional to 154,866.90, 213,703.38 and 86,874.42

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Solution

The fourth proportional to 154,866.90, 213,703.38 and 86,874.42 is: 119,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,866.90 : 213,703.38 = 86,874.42 : x
  2. Step 2: Convert to fraction form
    154,866.90/213,703.38 = 86,874.42/x
  3. Step 3: Cross multiply
    154,866.90x = 213,703.38 × 86,874.42
  4. Step 4: Simplify right side
    154,866.90x = 18,565,357,189.54
  5. Step 5: Solve for x
    x = 18,565,357,189.54/154,866.90
  6. Step 6: Final answer
    x = 119,879.44

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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.