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Finding the Fourth Proportional to 172,591.33, 238,118.95 and 100,920.61

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Solution

The fourth proportional to 172,591.33, 238,118.95 and 100,920.61 is: 139,237.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,591.33 : 238,118.95 = 100,920.61 : x
  2. Step 2: Convert to fraction form
    172,591.33/238,118.95 = 100,920.61/x
  3. Step 3: Cross multiply
    172,591.33x = 238,118.95 × 100,920.61
  4. Step 4: Simplify right side
    172,591.33x = 24,031,108,495.96
  5. Step 5: Solve for x
    x = 24,031,108,495.96/172,591.33
  6. Step 6: Final answer
    x = 139,237.06

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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.