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Finding the Fourth Proportional to 87,873.68, 131,831.40 and 28,709.30

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Solution

The fourth proportional to 87,873.68, 131,831.40 and 28,709.30 is: 43,070.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,873.68 : 131,831.40 = 28,709.30 : x
  2. Step 2: Convert to fraction form
    87,873.68/131,831.40 = 28,709.30/x
  3. Step 3: Cross multiply
    87,873.68x = 131,831.40 × 28,709.30
  4. Step 4: Simplify right side
    87,873.68x = 3,784,787,212.02
  5. Step 5: Solve for x
    x = 3,784,787,212.02/87,873.68
  6. Step 6: Final answer
    x = 43,070.77

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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.