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Finding the Fourth Proportional to 211,886.97, 317,881.49 and 78,771.57

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Solution

The fourth proportional to 211,886.97, 317,881.49 and 78,771.57 is: 118,176.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,886.97 : 317,881.49 = 78,771.57 : x
  2. Step 2: Convert to fraction form
    211,886.97/317,881.49 = 78,771.57/x
  3. Step 3: Cross multiply
    211,886.97x = 317,881.49 × 78,771.57
  4. Step 4: Simplify right side
    211,886.97x = 25,040,023,647.38
  5. Step 5: Solve for x
    x = 25,040,023,647.38/211,886.97
  6. Step 6: Final answer
    x = 118,176.33

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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.