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Finding the Fourth Proportional to 87,804.96, 131,728.43 and 28,640.71

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Solution

The fourth proportional to 87,804.96, 131,728.43 and 28,640.71 is: 42,967.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,804.96 : 131,728.43 = 28,640.71 : x
  2. Step 2: Convert to fraction form
    87,804.96/131,728.43 = 28,640.71/x
  3. Step 3: Cross multiply
    87,804.96x = 131,728.43 × 28,640.71
  4. Step 4: Simplify right side
    87,804.96x = 3,772,795,762.39
  5. Step 5: Solve for x
    x = 3,772,795,762.39/87,804.96
  6. Step 6: Final answer
    x = 42,967.91

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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.