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Finding the Fourth Proportional to 151,049.94, 208,440.90 and 87,388.80

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Solution

The fourth proportional to 151,049.94, 208,440.90 and 87,388.80 is: 120,591.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,049.94 : 208,440.90 = 87,388.80 : x
  2. Step 2: Convert to fraction form
    151,049.94/208,440.90 = 87,388.80/x
  3. Step 3: Cross multiply
    151,049.94x = 208,440.90 × 87,388.80
  4. Step 4: Simplify right side
    151,049.94x = 18,215,400,121.92
  5. Step 5: Solve for x
    x = 18,215,400,121.92/151,049.94
  6. Step 6: Final answer
    x = 120,591.91

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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.