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Finding the Fourth Proportional to 172,417.62, 258,630.78 and 47,759.70

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Solution

The fourth proportional to 172,417.62, 258,630.78 and 47,759.70 is: 71,640.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,417.62 : 258,630.78 = 47,759.70 : x
  2. Step 2: Convert to fraction form
    172,417.62/258,630.78 = 47,759.70/x
  3. Step 3: Cross multiply
    172,417.62x = 258,630.78 × 47,759.70
  4. Step 4: Simplify right side
    172,417.62x = 12,352,128,463.57
  5. Step 5: Solve for x
    x = 12,352,128,463.57/172,417.62
  6. Step 6: Final answer
    x = 71,640.75

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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.