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Finding the Fourth Proportional to 62,260, 85,918.80 and 39,904

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Solution

The fourth proportional to 62,260, 85,918.80 and 39,904 is: 55,067.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,260 : 85,918.80 = 39,904 : x
  2. Step 2: Convert to fraction form
    62,260/85,918.80 = 39,904/x
  3. Step 3: Cross multiply
    62,260x = 85,918.80 × 39,904
  4. Step 4: Simplify right side
    62,260x = 3,428,503,795.20
  5. Step 5: Solve for x
    x = 3,428,503,795.20/62,260
  6. Step 6: Final answer
    x = 55,067.52

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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.