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Finding the Fourth Proportional to 66,492.40, 99,655.44 and 33,221.78

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Solution

The fourth proportional to 66,492.40, 99,655.44 and 33,221.78 is: 49,791.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,492.40 : 99,655.44 = 33,221.78 : x
  2. Step 2: Convert to fraction form
    66,492.40/99,655.44 = 33,221.78/x
  3. Step 3: Cross multiply
    66,492.40x = 99,655.44 × 33,221.78
  4. Step 4: Simplify right side
    66,492.40x = 3,310,731,103.48
  5. Step 5: Solve for x
    x = 3,310,731,103.48/66,492.40
  6. Step 6: Final answer
    x = 49,791.12

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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.