Home / 109,541.20-164,311.80-72,605.20

Finding the Fourth Proportional to 109,541.20, 164,311.80 and 72,605.20

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Solution

The fourth proportional to 109,541.20, 164,311.80 and 72,605.20 is: 108,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,541.20 : 164,311.80 = 72,605.20 : x
  2. Step 2: Convert to fraction form
    109,541.20/164,311.80 = 72,605.20/x
  3. Step 3: Cross multiply
    109,541.20x = 164,311.80 × 72,605.20
  4. Step 4: Simplify right side
    109,541.20x = 11,929,891,101.36
  5. Step 5: Solve for x
    x = 11,929,891,101.36/109,541.20
  6. Step 6: Final answer
    x = 108,907.80

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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.