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Finding the Fourth Proportional to 172,420.32, 237,893.52 and 100,817.92

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Solution

The fourth proportional to 172,420.32, 237,893.52 and 100,817.92 is: 139,101.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,420.32 : 237,893.52 = 100,817.92 : x
  2. Step 2: Convert to fraction form
    172,420.32/237,893.52 = 100,817.92/x
  3. Step 3: Cross multiply
    172,420.32x = 237,893.52 × 100,817.92
  4. Step 4: Simplify right side
    172,420.32x = 23,983,929,867.88
  5. Step 5: Solve for x
    x = 23,983,929,867.88/172,420.32
  6. Step 6: Final answer
    x = 139,101.53

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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.