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Finding the Fourth Proportional to 172,600.40, 258,568.91 and 105,845.87

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Solution

The fourth proportional to 172,600.40, 258,568.91 and 105,845.87 is: 158,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,600.40 : 258,568.91 = 105,845.87 : x
  2. Step 2: Convert to fraction form
    172,600.40/258,568.91 = 105,845.87/x
  3. Step 3: Cross multiply
    172,600.40x = 258,568.91 × 105,845.87
  4. Step 4: Simplify right side
    172,600.40x = 27,368,450,704.67
  5. Step 5: Solve for x
    x = 27,368,450,704.67/172,600.40
  6. Step 6: Final answer
    x = 158,565.40

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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.