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Finding the Fourth Proportional to 172,490.67, 238,001.22 and 100,856.79

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Solution

The fourth proportional to 172,490.67, 238,001.22 and 100,856.79 is: 139,161.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,490.67 : 238,001.22 = 100,856.79 : x
  2. Step 2: Convert to fraction form
    172,490.67/238,001.22 = 100,856.79/x
  3. Step 3: Cross multiply
    172,490.67x = 238,001.22 × 100,856.79
  4. Step 4: Simplify right side
    172,490.67x = 24,004,039,065.28
  5. Step 5: Solve for x
    x = 24,004,039,065.28/172,490.67
  6. Step 6: Final answer
    x = 139,161.38

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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.