Home / 87,086-120,204.34-56,875.98

Finding the Fourth Proportional to 87,086, 120,204.34 and 56,875.98

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Solution

The fourth proportional to 87,086, 120,204.34 and 56,875.98 is: 78,505.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,086 : 120,204.34 = 56,875.98 : x
  2. Step 2: Convert to fraction form
    87,086/120,204.34 = 56,875.98/x
  3. Step 3: Cross multiply
    87,086x = 120,204.34 × 56,875.98
  4. Step 4: Simplify right side
    87,086x = 6,836,739,637.75
  5. Step 5: Solve for x
    x = 6,836,739,637.75/87,086
  6. Step 6: Final answer
    x = 78,505.61

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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.