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Finding the Fourth Proportional to 101,155.92, 139,660.92 and 90,527.28

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Solution

The fourth proportional to 101,155.92, 139,660.92 and 90,527.28 is: 124,986.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,155.92 : 139,660.92 = 90,527.28 : x
  2. Step 2: Convert to fraction form
    101,155.92/139,660.92 = 90,527.28/x
  3. Step 3: Cross multiply
    101,155.92x = 139,660.92 × 90,527.28
  4. Step 4: Simplify right side
    101,155.92x = 12,643,123,209.90
  5. Step 5: Solve for x
    x = 12,643,123,209.90/101,155.92
  6. Step 6: Final answer
    x = 124,986.49

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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.