Home / 87,375.58-120,328.74-78,687.79

Finding the Fourth Proportional to 87,375.58, 120,328.74 and 78,687.79

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Solution

The fourth proportional to 87,375.58, 120,328.74 and 78,687.79 is: 108,364.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,375.58 : 120,328.74 = 78,687.79 : x
  2. Step 2: Convert to fraction form
    87,375.58/120,328.74 = 78,687.79/x
  3. Step 3: Cross multiply
    87,375.58x = 120,328.74 × 78,687.79
  4. Step 4: Simplify right side
    87,375.58x = 9,468,402,323.26
  5. Step 5: Solve for x
    x = 9,468,402,323.26/87,375.58
  6. Step 6: Final answer
    x = 108,364.40

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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.