Home / 87,188.13-120,288.69-56,990.88

Finding the Fourth Proportional to 87,188.13, 120,288.69 and 56,990.88

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Solution

The fourth proportional to 87,188.13, 120,288.69 and 56,990.88 is: 78,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,188.13 : 120,288.69 = 56,990.88 : x
  2. Step 2: Convert to fraction form
    87,188.13/120,288.69 = 56,990.88/x
  3. Step 3: Cross multiply
    87,188.13x = 120,288.69 × 56,990.88
  4. Step 4: Simplify right side
    87,188.13x = 6,855,358,297.15
  5. Step 5: Solve for x
    x = 6,855,358,297.15/87,188.13
  6. Step 6: Final answer
    x = 78,627.20

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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.