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Finding the Fourth Proportional to 120,722.80, 180,868.20 and 58,255.60

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Solution

The fourth proportional to 120,722.80, 180,868.20 and 58,255.60 is: 87,279.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,722.80 : 180,868.20 = 58,255.60 : x
  2. Step 2: Convert to fraction form
    120,722.80/180,868.20 = 58,255.60/x
  3. Step 3: Cross multiply
    120,722.80x = 180,868.20 × 58,255.60
  4. Step 4: Simplify right side
    120,722.80x = 10,536,585,511.92
  5. Step 5: Solve for x
    x = 10,536,585,511.92/120,722.80
  6. Step 6: Final answer
    x = 87,279.17

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1.5x scale

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.