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Finding the Fourth Proportional to 103,511.85, 155,157.03 and 53,541.64

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Solution

The fourth proportional to 103,511.85, 155,157.03 and 53,541.64 is: 80,255.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,511.85 : 155,157.03 = 53,541.64 : x
  2. Step 2: Convert to fraction form
    103,511.85/155,157.03 = 53,541.64/x
  3. Step 3: Cross multiply
    103,511.85x = 155,157.03 × 53,541.64
  4. Step 4: Simplify right side
    103,511.85x = 8,307,361,843.73
  5. Step 5: Solve for x
    x = 8,307,361,843.73/103,511.85
  6. Step 6: Final answer
    x = 80,255.18

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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.