Home / 87,085.59-120,189.23-51,278.92

Finding the Fourth Proportional to 87,085.59, 120,189.23 and 51,278.92

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Solution

The fourth proportional to 87,085.59, 120,189.23 and 51,278.92 is: 70,771.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,085.59 : 120,189.23 = 51,278.92 : x
  2. Step 2: Convert to fraction form
    87,085.59/120,189.23 = 51,278.92/x
  3. Step 3: Cross multiply
    87,085.59x = 120,189.23 × 51,278.92
  4. Step 4: Simplify right side
    87,085.59x = 6,163,173,910.03
  5. Step 5: Solve for x
    x = 6,163,173,910.03/87,085.59
  6. Step 6: Final answer
    x = 70,771.45

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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.