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Finding the Fourth Proportional to 36,752.80, 55,068.40 and 21,143.20

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Solution

The fourth proportional to 36,752.80, 55,068.40 and 21,143.20 is: 31,679.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,752.80 : 55,068.40 = 21,143.20 : x
  2. Step 2: Convert to fraction form
    36,752.80/55,068.40 = 21,143.20/x
  3. Step 3: Cross multiply
    36,752.80x = 55,068.40 × 21,143.20
  4. Step 4: Simplify right side
    36,752.80x = 1,164,322,194.88
  5. Step 5: Solve for x
    x = 1,164,322,194.88/36,752.80
  6. Step 6: Final answer
    x = 31,679.82

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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.