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Finding the Fourth Proportional to 80,433.60, 120,650.40 and 59,438.40

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Solution

The fourth proportional to 80,433.60, 120,650.40 and 59,438.40 is: 89,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,433.60 : 120,650.40 = 59,438.40 : x
  2. Step 2: Convert to fraction form
    80,433.60/120,650.40 = 59,438.40/x
  3. Step 3: Cross multiply
    80,433.60x = 120,650.40 × 59,438.40
  4. Step 4: Simplify right side
    80,433.60x = 7,171,266,735.36
  5. Step 5: Solve for x
    x = 7,171,266,735.36/80,433.60
  6. Step 6: Final answer
    x = 89,157.60

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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.