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Finding the Fourth Proportional to 66,811.68, 100,239.12 and 22,458.72

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Solution

The fourth proportional to 66,811.68, 100,239.12 and 22,458.72 is: 33,695.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,811.68 : 100,239.12 = 22,458.72 : x
  2. Step 2: Convert to fraction form
    66,811.68/100,239.12 = 22,458.72/x
  3. Step 3: Cross multiply
    66,811.68x = 100,239.12 × 22,458.72
  4. Step 4: Simplify right side
    66,811.68x = 2,251,242,329.13
  5. Step 5: Solve for x
    x = 2,251,242,329.13/66,811.68
  6. Step 6: Final answer
    x = 33,695.34

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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.