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Finding the Fourth Proportional to 68,712.40, 103,019.40 and 26,556.40

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Solution

The fourth proportional to 68,712.40, 103,019.40 and 26,556.40 is: 39,815.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,712.40 : 103,019.40 = 26,556.40 : x
  2. Step 2: Convert to fraction form
    68,712.40/103,019.40 = 26,556.40/x
  3. Step 3: Cross multiply
    68,712.40x = 103,019.40 × 26,556.40
  4. Step 4: Simplify right side
    68,712.40x = 2,735,824,394.16
  5. Step 5: Solve for x
    x = 2,735,824,394.16/68,712.40
  6. Step 6: Final answer
    x = 39,815.58

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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.