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Finding the Fourth Proportional to 172,978.70, 238,734.30 and 101,387.25

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Solution

The fourth proportional to 172,978.70, 238,734.30 and 101,387.25 is: 139,928.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,978.70 : 238,734.30 = 101,387.25 : x
  2. Step 2: Convert to fraction form
    172,978.70/238,734.30 = 101,387.25/x
  3. Step 3: Cross multiply
    172,978.70x = 238,734.30 × 101,387.25
  4. Step 4: Simplify right side
    172,978.70x = 24,204,614,537.88
  5. Step 5: Solve for x
    x = 24,204,614,537.88/172,978.70
  6. Step 6: Final answer
    x = 139,928.30

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.