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Finding the Fourth Proportional to 87,149.71, 130,551.22 and 68,341.51

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Solution

The fourth proportional to 87,149.71, 130,551.22 and 68,341.51 is: 102,376.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,149.71 : 130,551.22 = 68,341.51 : x
  2. Step 2: Convert to fraction form
    87,149.71/130,551.22 = 68,341.51/x
  3. Step 3: Cross multiply
    87,149.71x = 130,551.22 × 68,341.51
  4. Step 4: Simplify right side
    87,149.71x = 8,922,067,507.14
  5. Step 5: Solve for x
    x = 8,922,067,507.14/87,149.71
  6. Step 6: Final answer
    x = 102,376.33

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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.