Home / 87,089.94-120,209.67-56,879.84

Finding the Fourth Proportional to 87,089.94, 120,209.67 and 56,879.84

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Solution

The fourth proportional to 87,089.94, 120,209.67 and 56,879.84 is: 78,510.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,089.94 : 120,209.67 = 56,879.84 : x
  2. Step 2: Convert to fraction form
    87,089.94/120,209.67 = 56,879.84/x
  3. Step 3: Cross multiply
    87,089.94x = 120,209.67 × 56,879.84
  4. Step 4: Simplify right side
    87,089.94x = 6,837,507,096.58
  5. Step 5: Solve for x
    x = 6,837,507,096.58/87,089.94
  6. Step 6: Final answer
    x = 78,510.87

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1.5x scale

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.