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Finding the Fourth Proportional to 66,041.60, 99,076.80 and 21,660.80

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Solution

The fourth proportional to 66,041.60, 99,076.80 and 21,660.80 is: 32,495.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,041.60 : 99,076.80 = 21,660.80 : x
  2. Step 2: Convert to fraction form
    66,041.60/99,076.80 = 21,660.80/x
  3. Step 3: Cross multiply
    66,041.60x = 99,076.80 × 21,660.80
  4. Step 4: Simplify right side
    66,041.60x = 2,146,082,749.44
  5. Step 5: Solve for x
    x = 2,146,082,749.44/66,041.60
  6. Step 6: Final answer
    x = 32,495.92

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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.