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Finding the Fourth Proportional to 78,843.40, 118,265.10 and 71,067.40

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Solution

The fourth proportional to 78,843.40, 118,265.10 and 71,067.40 is: 106,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,843.40 : 118,265.10 = 71,067.40 : x
  2. Step 2: Convert to fraction form
    78,843.40/118,265.10 = 71,067.40/x
  3. Step 3: Cross multiply
    78,843.40x = 118,265.10 × 71,067.40
  4. Step 4: Simplify right side
    78,843.40x = 8,404,793,167.74
  5. Step 5: Solve for x
    x = 8,404,793,167.74/78,843.40
  6. Step 6: Final answer
    x = 106,601.10

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1.5x scale

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.