Home / 87,683.56-131,525.34-81,385

Finding the Fourth Proportional to 87,683.56, 131,525.34 and 81,385

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Solution

The fourth proportional to 87,683.56, 131,525.34 and 81,385 is: 122,077.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,683.56 : 131,525.34 = 81,385 : x
  2. Step 2: Convert to fraction form
    87,683.56/131,525.34 = 81,385/x
  3. Step 3: Cross multiply
    87,683.56x = 131,525.34 × 81,385
  4. Step 4: Simplify right side
    87,683.56x = 10,704,189,795.90
  5. Step 5: Solve for x
    x = 10,704,189,795.90/87,683.56
  6. Step 6: Final answer
    x = 122,077.50

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1.5x scale

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.