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Finding the Fourth Proportional to 80,516.40, 120,774.60 and 47,252.40

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Solution

The fourth proportional to 80,516.40, 120,774.60 and 47,252.40 is: 70,878.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,516.40 : 120,774.60 = 47,252.40 : x
  2. Step 2: Convert to fraction form
    80,516.40/120,774.60 = 47,252.40/x
  3. Step 3: Cross multiply
    80,516.40x = 120,774.60 × 47,252.40
  4. Step 4: Simplify right side
    80,516.40x = 5,706,889,709.04
  5. Step 5: Solve for x
    x = 5,706,889,709.04/80,516.40
  6. Step 6: Final answer
    x = 70,878.60

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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.