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Finding the Fourth Proportional to 62,910, 86,815.80 and 34,615.08

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Solution

The fourth proportional to 62,910, 86,815.80 and 34,615.08 is: 47,768.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,910 : 86,815.80 = 34,615.08 : x
  2. Step 2: Convert to fraction form
    62,910/86,815.80 = 34,615.08/x
  3. Step 3: Cross multiply
    62,910x = 86,815.80 × 34,615.08
  4. Step 4: Simplify right side
    62,910x = 3,005,135,862.26
  5. Step 5: Solve for x
    x = 3,005,135,862.26/62,910
  6. Step 6: Final answer
    x = 47,768.81

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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.