Home / 109,521.20-164,346.60-72,189.20

Finding the Fourth Proportional to 109,521.20, 164,346.60 and 72,189.20

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Solution

The fourth proportional to 109,521.20, 164,346.60 and 72,189.20 is: 108,326.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,521.20 : 164,346.60 = 72,189.20 : x
  2. Step 2: Convert to fraction form
    109,521.20/164,346.60 = 72,189.20/x
  3. Step 3: Cross multiply
    109,521.20x = 164,346.60 × 72,189.20
  4. Step 4: Simplify right side
    109,521.20x = 11,864,049,576.72
  5. Step 5: Solve for x
    x = 11,864,049,576.72/109,521.20
  6. Step 6: Final answer
    x = 108,326.51

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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.