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Finding the Fourth Proportional to 92,990.91, 128,282.34 and 55,238.43

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Solution

The fourth proportional to 92,990.91, 128,282.34 and 55,238.43 is: 76,202.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,990.91 : 128,282.34 = 55,238.43 : x
  2. Step 2: Convert to fraction form
    92,990.91/128,282.34 = 55,238.43/x
  3. Step 3: Cross multiply
    92,990.91x = 128,282.34 × 55,238.43
  4. Step 4: Simplify right side
    92,990.91x = 7,086,115,058.33
  5. Step 5: Solve for x
    x = 7,086,115,058.33/92,990.91
  6. Step 6: Final answer
    x = 76,202.23

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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.