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Finding the Fourth Proportional to 61,978.90, 92,974.94 and 19,843.90

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Solution

The fourth proportional to 61,978.90, 92,974.94 and 19,843.90 is: 29,767.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,978.90 : 92,974.94 = 19,843.90 : x
  2. Step 2: Convert to fraction form
    61,978.90/92,974.94 = 19,843.90/x
  3. Step 3: Cross multiply
    61,978.90x = 92,974.94 × 19,843.90
  4. Step 4: Simplify right side
    61,978.90x = 1,844,985,411.87
  5. Step 5: Solve for x
    x = 1,844,985,411.87/61,978.90
  6. Step 6: Final answer
    x = 29,767.96

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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.