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Finding the Fourth Proportional to 73,175.06, 100,979.52 and 42,959.90

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Solution

The fourth proportional to 73,175.06, 100,979.52 and 42,959.90 is: 59,283.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,175.06 : 100,979.52 = 42,959.90 : x
  2. Step 2: Convert to fraction form
    73,175.06/100,979.52 = 42,959.90/x
  3. Step 3: Cross multiply
    73,175.06x = 100,979.52 × 42,959.90
  4. Step 4: Simplify right side
    73,175.06x = 4,338,070,081.25
  5. Step 5: Solve for x
    x = 4,338,070,081.25/73,175.06
  6. Step 6: Final answer
    x = 59,283.45

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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.