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Finding the Fourth Proportional to 120,343.60, 180,515.40 and 111,012.40

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Solution

The fourth proportional to 120,343.60, 180,515.40 and 111,012.40 is: 166,518.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,343.60 : 180,515.40 = 111,012.40 : x
  2. Step 2: Convert to fraction form
    120,343.60/180,515.40 = 111,012.40/x
  3. Step 3: Cross multiply
    120,343.60x = 180,515.40 × 111,012.40
  4. Step 4: Simplify right side
    120,343.60x = 20,039,447,790.96
  5. Step 5: Solve for x
    x = 20,039,447,790.96/120,343.60
  6. Step 6: Final answer
    x = 166,518.60

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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.