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Finding the Fourth Proportional to 66,361.12, 99,552.24 and 21,989.44

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Solution

The fourth proportional to 66,361.12, 99,552.24 and 21,989.44 is: 32,987.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,361.12 : 99,552.24 = 21,989.44 : x
  2. Step 2: Convert to fraction form
    66,361.12/99,552.24 = 21,989.44/x
  3. Step 3: Cross multiply
    66,361.12x = 99,552.24 × 21,989.44
  4. Step 4: Simplify right side
    66,361.12x = 2,189,098,008.35
  5. Step 5: Solve for x
    x = 2,189,098,008.35/66,361.12
  6. Step 6: Final answer
    x = 32,987.66

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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.