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Finding the Fourth Proportional to 103,213.60, 154,820.40 and 87,467.20

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Solution

The fourth proportional to 103,213.60, 154,820.40 and 87,467.20 is: 131,200.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,213.60 : 154,820.40 = 87,467.20 : x
  2. Step 2: Convert to fraction form
    103,213.60/154,820.40 = 87,467.20/x
  3. Step 3: Cross multiply
    103,213.60x = 154,820.40 × 87,467.20
  4. Step 4: Simplify right side
    103,213.60x = 13,541,706,890.88
  5. Step 5: Solve for x
    x = 13,541,706,890.88/103,213.60
  6. Step 6: Final answer
    x = 131,200.80

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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.