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Finding the Fourth Proportional to 66,245.67, 99,358.79 and 21,873.87

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Solution

The fourth proportional to 66,245.67, 99,358.79 and 21,873.87 is: 32,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,245.67 : 99,358.79 = 21,873.87 : x
  2. Step 2: Convert to fraction form
    66,245.67/99,358.79 = 21,873.87/x
  3. Step 3: Cross multiply
    66,245.67x = 99,358.79 × 21,873.87
  4. Step 4: Simplify right side
    66,245.67x = 2,173,361,146.45
  5. Step 5: Solve for x
    x = 2,173,361,146.45/66,245.67
  6. Step 6: Final answer
    x = 32,807.60

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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.