Home / 87,989.32-121,404.24-49,749.64

Finding the Fourth Proportional to 87,989.32, 121,404.24 and 49,749.64

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Solution

The fourth proportional to 87,989.32, 121,404.24 and 49,749.64 is: 68,642.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,989.32 : 121,404.24 = 49,749.64 : x
  2. Step 2: Convert to fraction form
    87,989.32/121,404.24 = 49,749.64/x
  3. Step 3: Cross multiply
    87,989.32x = 121,404.24 × 49,749.64
  4. Step 4: Simplify right side
    87,989.32x = 6,039,817,234.47
  5. Step 5: Solve for x
    x = 6,039,817,234.47/87,989.32
  6. Step 6: Final answer
    x = 68,642.62

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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.