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Finding the Fourth Proportional to 80,610.40, 120,915.60 and 72,445.60

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Solution

The fourth proportional to 80,610.40, 120,915.60 and 72,445.60 is: 108,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,610.40 : 120,915.60 = 72,445.60 : x
  2. Step 2: Convert to fraction form
    80,610.40/120,915.60 = 72,445.60/x
  3. Step 3: Cross multiply
    80,610.40x = 120,915.60 × 72,445.60
  4. Step 4: Simplify right side
    80,610.40x = 8,759,803,191.36
  5. Step 5: Solve for x
    x = 8,759,803,191.36/80,610.40
  6. Step 6: Final answer
    x = 108,668.40

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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.