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Finding the Fourth Proportional to 65,876.40, 98,821.49 and 19,129.28

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Solution

The fourth proportional to 65,876.40, 98,821.49 and 19,129.28 is: 28,695.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,876.40 : 98,821.49 = 19,129.28 : x
  2. Step 2: Convert to fraction form
    65,876.40/98,821.49 = 19,129.28/x
  3. Step 3: Cross multiply
    65,876.40x = 98,821.49 × 19,129.28
  4. Step 4: Simplify right side
    65,876.40x = 1,890,383,362.47
  5. Step 5: Solve for x
    x = 1,890,383,362.47/65,876.40
  6. Step 6: Final answer
    x = 28,695.91

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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.