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Finding the Fourth Proportional to 101,438.33, 139,581.29 and 98,356.68

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Solution

The fourth proportional to 101,438.33, 139,581.29 and 98,356.68 is: 135,340.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,438.33 : 139,581.29 = 98,356.68 : x
  2. Step 2: Convert to fraction form
    101,438.33/139,581.29 = 98,356.68/x
  3. Step 3: Cross multiply
    101,438.33x = 139,581.29 × 98,356.68
  4. Step 4: Simplify right side
    101,438.33x = 13,728,752,520.41
  5. Step 5: Solve for x
    x = 13,728,752,520.41/101,438.33
  6. Step 6: Final answer
    x = 135,340.88

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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.