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Finding the Fourth Proportional to 80,601.80, 120,672.30 and 72,307.40

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Solution

The fourth proportional to 80,601.80, 120,672.30 and 72,307.40 is: 108,254.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,601.80 : 120,672.30 = 72,307.40 : x
  2. Step 2: Convert to fraction form
    80,601.80/120,672.30 = 72,307.40/x
  3. Step 3: Cross multiply
    80,601.80x = 120,672.30 × 72,307.40
  4. Step 4: Simplify right side
    80,601.80x = 8,725,500,265.02
  5. Step 5: Solve for x
    x = 8,725,500,265.02/80,601.80
  6. Step 6: Final answer
    x = 108,254.41

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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.