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Finding the Fourth Proportional to 135,031.60, 202,498.80 and 68,449.60

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Solution

The fourth proportional to 135,031.60, 202,498.80 and 68,449.60 is: 102,649.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,031.60 : 202,498.80 = 68,449.60 : x
  2. Step 2: Convert to fraction form
    135,031.60/202,498.80 = 68,449.60/x
  3. Step 3: Cross multiply
    135,031.60x = 202,498.80 × 68,449.60
  4. Step 4: Simplify right side
    135,031.60x = 13,860,961,860.48
  5. Step 5: Solve for x
    x = 13,860,961,860.48/135,031.60
  6. Step 6: Final answer
    x = 102,649.76

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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.