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Finding the Fourth Proportional to 172,572.26, 238,165.80 and 100,947.74

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Solution

The fourth proportional to 172,572.26, 238,165.80 and 100,947.74 is: 139,317.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,572.26 : 238,165.80 = 100,947.74 : x
  2. Step 2: Convert to fraction form
    172,572.26/238,165.80 = 100,947.74/x
  3. Step 3: Cross multiply
    172,572.26x = 238,165.80 × 100,947.74
  4. Step 4: Simplify right side
    172,572.26x = 24,042,299,255.29
  5. Step 5: Solve for x
    x = 24,042,299,255.29/172,572.26
  6. Step 6: Final answer
    x = 139,317.29

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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.