Home / 103,078.20-154,617.30-87,331.80

Finding the Fourth Proportional to 103,078.20, 154,617.30 and 87,331.80

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Solution

The fourth proportional to 103,078.20, 154,617.30 and 87,331.80 is: 130,997.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,078.20 : 154,617.30 = 87,331.80 : x
  2. Step 2: Convert to fraction form
    103,078.20/154,617.30 = 87,331.80/x
  3. Step 3: Cross multiply
    103,078.20x = 154,617.30 × 87,331.80
  4. Step 4: Simplify right side
    103,078.20x = 13,503,007,120.14
  5. Step 5: Solve for x
    x = 13,503,007,120.14/103,078.20
  6. Step 6: Final answer
    x = 130,997.70

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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.