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Finding the Fourth Proportional to 45,279.78, 67,919.76 and 15,697.68

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Solution

The fourth proportional to 45,279.78, 67,919.76 and 15,697.68 is: 23,546.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,279.78 : 67,919.76 = 15,697.68 : x
  2. Step 2: Convert to fraction form
    45,279.78/67,919.76 = 15,697.68/x
  3. Step 3: Cross multiply
    45,279.78x = 67,919.76 × 15,697.68
  4. Step 4: Simplify right side
    45,279.78x = 1,066,182,658.16
  5. Step 5: Solve for x
    x = 1,066,182,658.16/45,279.78
  6. Step 6: Final answer
    x = 23,546.55

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1.5x scale

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.