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Finding the Fourth Proportional to 65,355.94, 98,046.62 and 20,979.28

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Solution

The fourth proportional to 65,355.94, 98,046.62 and 20,979.28 is: 31,473.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,355.94 : 98,046.62 = 20,979.28 : x
  2. Step 2: Convert to fraction form
    65,355.94/98,046.62 = 20,979.28/x
  3. Step 3: Cross multiply
    65,355.94x = 98,046.62 × 20,979.28
  4. Step 4: Simplify right side
    65,355.94x = 2,056,947,494.03
  5. Step 5: Solve for x
    x = 2,056,947,494.03/65,355.94
  6. Step 6: Final answer
    x = 31,473.00

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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.