Home / 109,897.20-164,845.80-80,372.70

Finding the Fourth Proportional to 109,897.20, 164,845.80 and 80,372.70

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Solution

The fourth proportional to 109,897.20, 164,845.80 and 80,372.70 is: 120,559.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,897.20 : 164,845.80 = 80,372.70 : x
  2. Step 2: Convert to fraction form
    109,897.20/164,845.80 = 80,372.70/x
  3. Step 3: Cross multiply
    109,897.20x = 164,845.80 × 80,372.70
  4. Step 4: Simplify right side
    109,897.20x = 13,249,102,029.66
  5. Step 5: Solve for x
    x = 13,249,102,029.66/109,897.20
  6. Step 6: Final answer
    x = 120,559.05

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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.