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Finding the Fourth Proportional to 101,085.92, 139,409.95 and 80,935.46

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Solution

The fourth proportional to 101,085.92, 139,409.95 and 80,935.46 is: 111,619.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,085.92 : 139,409.95 = 80,935.46 : x
  2. Step 2: Convert to fraction form
    101,085.92/139,409.95 = 80,935.46/x
  3. Step 3: Cross multiply
    101,085.92x = 139,409.95 × 80,935.46
  4. Step 4: Simplify right side
    101,085.92x = 11,283,207,330.10
  5. Step 5: Solve for x
    x = 11,283,207,330.10/101,085.92
  6. Step 6: Final answer
    x = 111,619.97

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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.