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Finding the Fourth Proportional to 61,255.20, 91,882.80 and 21,856.80

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Solution

The fourth proportional to 61,255.20, 91,882.80 and 21,856.80 is: 32,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,255.20 : 91,882.80 = 21,856.80 : x
  2. Step 2: Convert to fraction form
    61,255.20/91,882.80 = 21,856.80/x
  3. Step 3: Cross multiply
    61,255.20x = 91,882.80 × 21,856.80
  4. Step 4: Simplify right side
    61,255.20x = 2,008,263,983.04
  5. Step 5: Solve for x
    x = 2,008,263,983.04/61,255.20
  6. Step 6: Final answer
    x = 32,785.20

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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.