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Finding the Fourth Proportional to 66,416.64, 99,619.20 and 22,041.60

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Solution

The fourth proportional to 66,416.64, 99,619.20 and 22,041.60 is: 33,060.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,416.64 : 99,619.20 = 22,041.60 : x
  2. Step 2: Convert to fraction form
    66,416.64/99,619.20 = 22,041.60/x
  3. Step 3: Cross multiply
    66,416.64x = 99,619.20 × 22,041.60
  4. Step 4: Simplify right side
    66,416.64x = 2,195,766,558.72
  5. Step 5: Solve for x
    x = 2,195,766,558.72/66,416.64
  6. Step 6: Final answer
    x = 33,060.49

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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.