Home / 87,765.30-131,661.60-28,587.20

Finding the Fourth Proportional to 87,765.30, 131,661.60 and 28,587.20

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Solution

The fourth proportional to 87,765.30, 131,661.60 and 28,587.20 is: 42,885.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,765.30 : 131,661.60 = 28,587.20 : x
  2. Step 2: Convert to fraction form
    87,765.30/131,661.60 = 28,587.20/x
  3. Step 3: Cross multiply
    87,765.30x = 131,661.60 × 28,587.20
  4. Step 4: Simplify right side
    87,765.30x = 3,763,836,491.52
  5. Step 5: Solve for x
    x = 3,763,836,491.52/87,765.30
  6. Step 6: Final answer
    x = 42,885.25

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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.