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Finding the Fourth Proportional to 101,415.88, 139,911.06 and 67,892.68

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Solution

The fourth proportional to 101,415.88, 139,911.06 and 67,892.68 is: 93,663.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,415.88 : 139,911.06 = 67,892.68 : x
  2. Step 2: Convert to fraction form
    101,415.88/139,911.06 = 67,892.68/x
  3. Step 3: Cross multiply
    101,415.88x = 139,911.06 × 67,892.68
  4. Step 4: Simplify right side
    101,415.88x = 9,498,936,825.04
  5. Step 5: Solve for x
    x = 9,498,936,825.04/101,415.88
  6. Step 6: Final answer
    x = 93,663.21

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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.