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Finding the Fourth Proportional to 73,173.04, 100,979.28 and 39,639.04

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Solution

The fourth proportional to 73,173.04, 100,979.28 and 39,639.04 is: 54,702.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,173.04 : 100,979.28 = 39,639.04 : x
  2. Step 2: Convert to fraction form
    73,173.04/100,979.28 = 39,639.04/x
  3. Step 3: Cross multiply
    73,173.04x = 100,979.28 × 39,639.04
  4. Step 4: Simplify right side
    73,173.04x = 4,002,721,719.09
  5. Step 5: Solve for x
    x = 4,002,721,719.09/73,173.04
  6. Step 6: Final answer
    x = 54,702.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.