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Finding the Fourth Proportional to 101,262.34, 139,680.21 and 71,003.98

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Solution

The fourth proportional to 101,262.34, 139,680.21 and 71,003.98 is: 97,942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,262.34 : 139,680.21 = 71,003.98 : x
  2. Step 2: Convert to fraction form
    101,262.34/139,680.21 = 71,003.98/x
  3. Step 3: Cross multiply
    101,262.34x = 139,680.21 × 71,003.98
  4. Step 4: Simplify right side
    101,262.34x = 9,917,850,837.24
  5. Step 5: Solve for x
    x = 9,917,850,837.24/101,262.34
  6. Step 6: Final answer
    x = 97,942.15

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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.