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Finding the Fourth Proportional to 61,755.30, 92,640.78 and 19,620.34

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Solution

The fourth proportional to 61,755.30, 92,640.78 and 19,620.34 is: 29,433.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,755.30 : 92,640.78 = 19,620.34 : x
  2. Step 2: Convert to fraction form
    61,755.30/92,640.78 = 19,620.34/x
  3. Step 3: Cross multiply
    61,755.30x = 92,640.78 × 19,620.34
  4. Step 4: Simplify right side
    61,755.30x = 1,817,643,601.47
  5. Step 5: Solve for x
    x = 1,817,643,601.47/61,755.30
  6. Step 6: Final answer
    x = 29,433.00

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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.