Home / 87,021.98-120,049.80-51,189.20

Finding the Fourth Proportional to 87,021.98, 120,049.80 and 51,189.20

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Solution

The fourth proportional to 87,021.98, 120,049.80 and 51,189.20 is: 70,617.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,021.98 : 120,049.80 = 51,189.20 : x
  2. Step 2: Convert to fraction form
    87,021.98/120,049.80 = 51,189.20/x
  3. Step 3: Cross multiply
    87,021.98x = 120,049.80 × 51,189.20
  4. Step 4: Simplify right side
    87,021.98x = 6,145,253,222.16
  5. Step 5: Solve for x
    x = 6,145,253,222.16/87,021.98
  6. Step 6: Final answer
    x = 70,617.25

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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.