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Finding the Fourth Proportional to 66,691.86, 99,985.88 and 33,394.80

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Solution

The fourth proportional to 66,691.86, 99,985.88 and 33,394.80 is: 50,066.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,691.86 : 99,985.88 = 33,394.80 : x
  2. Step 2: Convert to fraction form
    66,691.86/99,985.88 = 33,394.80/x
  3. Step 3: Cross multiply
    66,691.86x = 99,985.88 × 33,394.80
  4. Step 4: Simplify right side
    66,691.86x = 3,339,008,465.42
  5. Step 5: Solve for x
    x = 3,339,008,465.42/66,691.86
  6. Step 6: Final answer
    x = 50,066.21

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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.