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Finding the Fourth Proportional to 65,988.52, 98,961.94 and 21,605.07

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Solution

The fourth proportional to 65,988.52, 98,961.94 and 21,605.07 is: 32,400.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,988.52 : 98,961.94 = 21,605.07 : x
  2. Step 2: Convert to fraction form
    65,988.52/98,961.94 = 21,605.07/x
  3. Step 3: Cross multiply
    65,988.52x = 98,961.94 × 21,605.07
  4. Step 4: Simplify right side
    65,988.52x = 2,138,079,641.04
  5. Step 5: Solve for x
    x = 2,138,079,641.04/65,988.52
  6. Step 6: Final answer
    x = 32,400.78

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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.