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Finding the Fourth Proportional to 73,970.98, 102,079.98 and 39,979.36

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Solution

The fourth proportional to 73,970.98, 102,079.98 and 39,979.36 is: 55,171.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,970.98 : 102,079.98 = 39,979.36 : x
  2. Step 2: Convert to fraction form
    73,970.98/102,079.98 = 39,979.36/x
  3. Step 3: Cross multiply
    73,970.98x = 102,079.98 × 39,979.36
  4. Step 4: Simplify right side
    73,970.98x = 4,081,092,269.21
  5. Step 5: Solve for x
    x = 4,081,092,269.21/73,970.98
  6. Step 6: Final answer
    x = 55,171.53

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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.