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Finding the Fourth Proportional to 61,167.86, 91,729.77 and 21,175.98

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Solution

The fourth proportional to 61,167.86, 91,729.77 and 21,175.98 is: 31,756.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,167.86 : 91,729.77 = 21,175.98 : x
  2. Step 2: Convert to fraction form
    61,167.86/91,729.77 = 21,175.98/x
  3. Step 3: Cross multiply
    61,167.86x = 91,729.77 × 21,175.98
  4. Step 4: Simplify right side
    61,167.86x = 1,942,467,774.92
  5. Step 5: Solve for x
    x = 1,942,467,774.92/61,167.86
  6. Step 6: Final answer
    x = 31,756.35

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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.