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Finding the Fourth Proportional to 66,201.80, 99,276.30 and 21,816.20

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Solution

The fourth proportional to 66,201.80, 99,276.30 and 21,816.20 is: 32,715.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,201.80 : 99,276.30 = 21,816.20 : x
  2. Step 2: Convert to fraction form
    66,201.80/99,276.30 = 21,816.20/x
  3. Step 3: Cross multiply
    66,201.80x = 99,276.30 × 21,816.20
  4. Step 4: Simplify right side
    66,201.80x = 2,165,831,616.06
  5. Step 5: Solve for x
    x = 2,165,831,616.06/66,201.80
  6. Step 6: Final answer
    x = 32,715.60

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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.