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Finding the Fourth Proportional to 65,894.88, 98,821.68 and 21,511.52

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Solution

The fourth proportional to 65,894.88, 98,821.68 and 21,511.52 is: 32,260.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,894.88 : 98,821.68 = 21,511.52 : x
  2. Step 2: Convert to fraction form
    65,894.88/98,821.68 = 21,511.52/x
  3. Step 3: Cross multiply
    65,894.88x = 98,821.68 × 21,511.52
  4. Step 4: Simplify right side
    65,894.88x = 2,125,804,545.75
  5. Step 5: Solve for x
    x = 2,125,804,545.75/65,894.88
  6. Step 6: Final answer
    x = 32,260.54

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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.