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Finding the Fourth Proportional to 200,714.40, 300,808.80 and 100,987.20

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Solution

The fourth proportional to 200,714.40, 300,808.80 and 100,987.20 is: 151,348.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,714.40 : 300,808.80 = 100,987.20 : x
  2. Step 2: Convert to fraction form
    200,714.40/300,808.80 = 100,987.20/x
  3. Step 3: Cross multiply
    200,714.40x = 300,808.80 × 100,987.20
  4. Step 4: Simplify right side
    200,714.40x = 30,377,838,447.36
  5. Step 5: Solve for x
    x = 30,377,838,447.36/200,714.40
  6. Step 6: Final answer
    x = 151,348.58

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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.