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Finding the Fourth Proportional to 55,135.80, 82,663.20 and 21,839.40

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Solution

The fourth proportional to 55,135.80, 82,663.20 and 21,839.40 is: 32,743.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,135.80 : 82,663.20 = 21,839.40 : x
  2. Step 2: Convert to fraction form
    55,135.80/82,663.20 = 21,839.40/x
  3. Step 3: Cross multiply
    55,135.80x = 82,663.20 × 21,839.40
  4. Step 4: Simplify right side
    55,135.80x = 1,805,314,690.08
  5. Step 5: Solve for x
    x = 1,805,314,690.08/55,135.80
  6. Step 6: Final answer
    x = 32,743.06

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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.