Home / 109,139.92-163,709.88-72,195.28

Finding the Fourth Proportional to 109,139.92, 163,709.88 and 72,195.28

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Solution

The fourth proportional to 109,139.92, 163,709.88 and 72,195.28 is: 108,292.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,139.92 : 163,709.88 = 72,195.28 : x
  2. Step 2: Convert to fraction form
    109,139.92/163,709.88 = 72,195.28/x
  3. Step 3: Cross multiply
    109,139.92x = 163,709.88 × 72,195.28
  4. Step 4: Simplify right side
    109,139.92x = 11,819,080,625.37
  5. Step 5: Solve for x
    x = 11,819,080,625.37/109,139.92
  6. Step 6: Final answer
    x = 108,292.92

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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.