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Finding the Fourth Proportional to 103,397.20, 155,241.60 and 64,031.20

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Solution

The fourth proportional to 103,397.20, 155,241.60 and 64,031.20 is: 96,137.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,397.20 : 155,241.60 = 64,031.20 : x
  2. Step 2: Convert to fraction form
    103,397.20/155,241.60 = 64,031.20/x
  3. Step 3: Cross multiply
    103,397.20x = 155,241.60 × 64,031.20
  4. Step 4: Simplify right side
    103,397.20x = 9,940,305,937.92
  5. Step 5: Solve for x
    x = 9,940,305,937.92/103,397.20
  6. Step 6: Final answer
    x = 96,137.09

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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.