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Finding the Fourth Proportional to 120,622.60, 180,933.90 and 112,846.60

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Solution

The fourth proportional to 120,622.60, 180,933.90 and 112,846.60 is: 169,269.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,622.60 : 180,933.90 = 112,846.60 : x
  2. Step 2: Convert to fraction form
    120,622.60/180,933.90 = 112,846.60/x
  3. Step 3: Cross multiply
    120,622.60x = 180,933.90 × 112,846.60
  4. Step 4: Simplify right side
    120,622.60x = 20,417,775,439.74
  5. Step 5: Solve for x
    x = 20,417,775,439.74/120,622.60
  6. Step 6: Final answer
    x = 169,269.90

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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.