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Finding the Fourth Proportional to 120,344.60, 180,905.70 and 111,013.40

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Solution

The fourth proportional to 120,344.60, 180,905.70 and 111,013.40 is: 166,878.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,344.60 : 180,905.70 = 111,013.40 : x
  2. Step 2: Convert to fraction form
    120,344.60/180,905.70 = 111,013.40/x
  3. Step 3: Cross multiply
    120,344.60x = 180,905.70 × 111,013.40
  4. Step 4: Simplify right side
    120,344.60x = 20,082,956,836.38
  5. Step 5: Solve for x
    x = 20,082,956,836.38/120,344.60
  6. Step 6: Final answer
    x = 166,878.75

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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.