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Finding the Fourth Proportional to 172,215.78, 237,642.03 and 99,600.09

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Solution

The fourth proportional to 172,215.78, 237,642.03 and 99,600.09 is: 137,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,215.78 : 237,642.03 = 99,600.09 : x
  2. Step 2: Convert to fraction form
    172,215.78/237,642.03 = 99,600.09/x
  3. Step 3: Cross multiply
    172,215.78x = 237,642.03 × 99,600.09
  4. Step 4: Simplify right side
    172,215.78x = 23,669,167,575.78
  5. Step 5: Solve for x
    x = 23,669,167,575.78/172,215.78
  6. Step 6: Final answer
    x = 137,439.02

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1.5x scale

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.