Home / 109,581.20-164,436.60-72,249.20

Finding the Fourth Proportional to 109,581.20, 164,436.60 and 72,249.20

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Solution

The fourth proportional to 109,581.20, 164,436.60 and 72,249.20 is: 108,416.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,581.20 : 164,436.60 = 72,249.20 : x
  2. Step 2: Convert to fraction form
    109,581.20/164,436.60 = 72,249.20/x
  3. Step 3: Cross multiply
    109,581.20x = 164,436.60 × 72,249.20
  4. Step 4: Simplify right side
    109,581.20x = 11,880,412,800.72
  5. Step 5: Solve for x
    x = 11,880,412,800.72/109,581.20
  6. Step 6: Final answer
    x = 108,416.52

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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.