Home / 109,342.20-164,078.10-72,009.30

Finding the Fourth Proportional to 109,342.20, 164,078.10 and 72,009.30

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Solution

The fourth proportional to 109,342.20, 164,078.10 and 72,009.30 is: 108,056.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,342.20 : 164,078.10 = 72,009.30 : x
  2. Step 2: Convert to fraction form
    109,342.20/164,078.10 = 72,009.30/x
  3. Step 3: Cross multiply
    109,342.20x = 164,078.10 × 72,009.30
  4. Step 4: Simplify right side
    109,342.20x = 11,815,149,126.33
  5. Step 5: Solve for x
    x = 11,815,149,126.33/109,342.20
  6. Step 6: Final answer
    x = 108,056.63

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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.