Home / 120,491.28-180,774.70-72,512.25

Finding the Fourth Proportional to 120,491.28, 180,774.70 and 72,512.25

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Solution

The fourth proportional to 120,491.28, 180,774.70 and 72,512.25 is: 108,791.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,491.28 : 180,774.70 = 72,512.25 : x
  2. Step 2: Convert to fraction form
    120,491.28/180,774.70 = 72,512.25/x
  3. Step 3: Cross multiply
    120,491.28x = 180,774.70 × 72,512.25
  4. Step 4: Simplify right side
    120,491.28x = 13,108,380,240.08
  5. Step 5: Solve for x
    x = 13,108,380,240.08/120,491.28
  6. Step 6: Final answer
    x = 108,791.11

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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.