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Finding the Fourth Proportional to 154,866.88, 213,703.36 and 86,874.40

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Solution

The fourth proportional to 154,866.88, 213,703.36 and 86,874.40 is: 119,879.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,866.88 : 213,703.36 = 86,874.40 : x
  2. Step 2: Convert to fraction form
    154,866.88/213,703.36 = 86,874.40/x
  3. Step 3: Cross multiply
    154,866.88x = 213,703.36 × 86,874.40
  4. Step 4: Simplify right side
    154,866.88x = 18,565,351,177.98
  5. Step 5: Solve for x
    x = 18,565,351,177.98/154,866.88
  6. Step 6: Final answer
    x = 119,879.42

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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.