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Finding the Fourth Proportional to 87,245.44, 130,881.12 and 28,065.76

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Solution

The fourth proportional to 87,245.44, 130,881.12 and 28,065.76 is: 42,102.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,245.44 : 130,881.12 = 28,065.76 : x
  2. Step 2: Convert to fraction form
    87,245.44/130,881.12 = 28,065.76/x
  3. Step 3: Cross multiply
    87,245.44x = 130,881.12 × 28,065.76
  4. Step 4: Simplify right side
    87,245.44x = 3,673,278,102.45
  5. Step 5: Solve for x
    x = 3,673,278,102.45/87,245.44
  6. Step 6: Final answer
    x = 42,102.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.