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Finding the Fourth Proportional to 315,751.62, 435,743.51 and 172,520.55

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Solution

The fourth proportional to 315,751.62, 435,743.51 and 172,520.55 is: 238,081.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,751.62 : 435,743.51 = 172,520.55 : x
  2. Step 2: Convert to fraction form
    315,751.62/435,743.51 = 172,520.55/x
  3. Step 3: Cross multiply
    315,751.62x = 435,743.51 × 172,520.55
  4. Step 4: Simplify right side
    315,751.62x = 75,174,709,141.53
  5. Step 5: Solve for x
    x = 75,174,709,141.53/315,751.62
  6. Step 6: Final answer
    x = 238,081.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.