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Finding the Fourth Proportional to 150,818.81, 208,106.79 and 87,144.30

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Solution

The fourth proportional to 150,818.81, 208,106.79 and 87,144.30 is: 120,245.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,818.81 : 208,106.79 = 87,144.30 : x
  2. Step 2: Convert to fraction form
    150,818.81/208,106.79 = 87,144.30/x
  3. Step 3: Cross multiply
    150,818.81x = 208,106.79 × 87,144.30
  4. Step 4: Simplify right side
    150,818.81x = 18,135,320,539.80
  5. Step 5: Solve for x
    x = 18,135,320,539.80/150,818.81
  6. Step 6: Final answer
    x = 120,245.75

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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.