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Finding the Fourth Proportional to 66,811.20, 100,216.80 and 22,439.40

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Solution

The fourth proportional to 66,811.20, 100,216.80 and 22,439.40 is: 33,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,811.20 : 100,216.80 = 22,439.40 : x
  2. Step 2: Convert to fraction form
    66,811.20/100,216.80 = 22,439.40/x
  3. Step 3: Cross multiply
    66,811.20x = 100,216.80 × 22,439.40
  4. Step 4: Simplify right side
    66,811.20x = 2,248,804,861.92
  5. Step 5: Solve for x
    x = 2,248,804,861.92/66,811.20
  6. Step 6: Final answer
    x = 33,659.10

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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.