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Finding the Fourth Proportional to 80,450.40, 120,675.60 and 75,266.40

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Solution

The fourth proportional to 80,450.40, 120,675.60 and 75,266.40 is: 112,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,450.40 : 120,675.60 = 75,266.40 : x
  2. Step 2: Convert to fraction form
    80,450.40/120,675.60 = 75,266.40/x
  3. Step 3: Cross multiply
    80,450.40x = 120,675.60 × 75,266.40
  4. Step 4: Simplify right side
    80,450.40x = 9,082,817,979.84
  5. Step 5: Solve for x
    x = 9,082,817,979.84/80,450.40
  6. Step 6: Final answer
    x = 112,899.60

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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.