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Finding the Fourth Proportional to 61,392, 84,721.92 and 39,066.24

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Solution

The fourth proportional to 61,392, 84,721.92 and 39,066.24 is: 53,912.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,392 : 84,721.92 = 39,066.24 : x
  2. Step 2: Convert to fraction form
    61,392/84,721.92 = 39,066.24/x
  3. Step 3: Cross multiply
    61,392x = 84,721.92 × 39,066.24
  4. Step 4: Simplify right side
    61,392x = 3,309,766,859.98
  5. Step 5: Solve for x
    x = 3,309,766,859.98/61,392
  6. Step 6: Final answer
    x = 53,912.02

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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.