Home / 156,255.21-215,616.78-87,331.95

Finding the Fourth Proportional to 156,255.21, 215,616.78 and 87,331.95

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Solution

The fourth proportional to 156,255.21, 215,616.78 and 87,331.95 is: 120,509.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,255.21 : 215,616.78 = 87,331.95 : x
  2. Step 2: Convert to fraction form
    156,255.21/215,616.78 = 87,331.95/x
  3. Step 3: Cross multiply
    156,255.21x = 215,616.78 × 87,331.95
  4. Step 4: Simplify right side
    156,255.21x = 18,830,233,850.12
  5. Step 5: Solve for x
    x = 18,830,233,850.12/156,255.21
  6. Step 6: Final answer
    x = 120,509.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.