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Finding the Fourth Proportional to 172,568.68, 258,836 and 54,236.86

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Solution

The fourth proportional to 172,568.68, 258,836 and 54,236.86 is: 81,349.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,568.68 : 258,836 = 54,236.86 : x
  2. Step 2: Convert to fraction form
    172,568.68/258,836 = 54,236.86/x
  3. Step 3: Cross multiply
    172,568.68x = 258,836 × 54,236.86
  4. Step 4: Simplify right side
    172,568.68x = 14,038,451,894.96
  5. Step 5: Solve for x
    x = 14,038,451,894.96/172,568.68
  6. Step 6: Final answer
    x = 81,349.94

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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.