Home / 109,129.92-163,694.88-72,185.28

Finding the Fourth Proportional to 109,129.92, 163,694.88 and 72,185.28

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Solution

The fourth proportional to 109,129.92, 163,694.88 and 72,185.28 is: 108,277.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,129.92 : 163,694.88 = 72,185.28 : x
  2. Step 2: Convert to fraction form
    109,129.92/163,694.88 = 72,185.28/x
  3. Step 3: Cross multiply
    109,129.92x = 163,694.88 × 72,185.28
  4. Step 4: Simplify right side
    109,129.92x = 11,816,360,747.37
  5. Step 5: Solve for x
    x = 11,816,360,747.37/109,129.92
  6. Step 6: Final answer
    x = 108,277.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.