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Finding the Fourth Proportional to 61,661.25, 92,491.88 and 20,108.25

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Solution

The fourth proportional to 61,661.25, 92,491.88 and 20,108.25 is: 30,162.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,661.25 : 92,491.88 = 20,108.25 : x
  2. Step 2: Convert to fraction form
    61,661.25/92,491.88 = 20,108.25/x
  3. Step 3: Cross multiply
    61,661.25x = 92,491.88 × 20,108.25
  4. Step 4: Simplify right side
    61,661.25x = 1,859,849,745.47
  5. Step 5: Solve for x
    x = 1,859,849,745.47/61,661.25
  6. Step 6: Final answer
    x = 30,162.38

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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.