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Finding the Fourth Proportional to 258,288.60, 387,371.22 and 108,531.72

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Solution

The fourth proportional to 258,288.60, 387,371.22 and 108,531.72 is: 162,771.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,288.60 : 387,371.22 = 108,531.72 : x
  2. Step 2: Convert to fraction form
    258,288.60/387,371.22 = 108,531.72/x
  3. Step 3: Cross multiply
    258,288.60x = 387,371.22 × 108,531.72
  4. Step 4: Simplify right side
    258,288.60x = 42,042,064,785.10
  5. Step 5: Solve for x
    x = 42,042,064,785.10/258,288.60
  6. Step 6: Final answer
    x = 162,771.66

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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.