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Finding the Fourth Proportional to 55,279.72, 76,296.90 and 38,503

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Solution

The fourth proportional to 55,279.72, 76,296.90 and 38,503 is: 53,141.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,279.72 : 76,296.90 = 38,503 : x
  2. Step 2: Convert to fraction form
    55,279.72/76,296.90 = 38,503/x
  3. Step 3: Cross multiply
    55,279.72x = 76,296.90 × 38,503
  4. Step 4: Simplify right side
    55,279.72x = 2,937,659,540.70
  5. Step 5: Solve for x
    x = 2,937,659,540.70/55,279.72
  6. Step 6: Final answer
    x = 53,141.72

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1.5x scale

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.