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Finding the Fourth Proportional to 71,611.55, 107,461.20 and 29,511.80

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Solution

The fourth proportional to 71,611.55, 107,461.20 and 29,511.80 is: 44,285.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,611.55 : 107,461.20 = 29,511.80 : x
  2. Step 2: Convert to fraction form
    71,611.55/107,461.20 = 29,511.80/x
  3. Step 3: Cross multiply
    71,611.55x = 107,461.20 × 29,511.80
  4. Step 4: Simplify right side
    71,611.55x = 3,171,373,442.16
  5. Step 5: Solve for x
    x = 3,171,373,442.16/71,611.55
  6. Step 6: Final answer
    x = 44,285.78

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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.