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Finding the Fourth Proportional to 172,150.78, 257,747.16 and 87,728.92

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Solution

The fourth proportional to 172,150.78, 257,747.16 and 87,728.92 is: 131,349.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,150.78 : 257,747.16 = 87,728.92 : x
  2. Step 2: Convert to fraction form
    172,150.78/257,747.16 = 87,728.92/x
  3. Step 3: Cross multiply
    172,150.78x = 257,747.16 × 87,728.92
  4. Step 4: Simplify right side
    172,150.78x = 22,611,879,979.87
  5. Step 5: Solve for x
    x = 22,611,879,979.87/172,150.78
  6. Step 6: Final answer
    x = 131,349.27

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1.5x scale

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.