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Finding the Fourth Proportional to 71,121.69, 98,150.76 and 40,906.98

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Solution

The fourth proportional to 71,121.69, 98,150.76 and 40,906.98 is: 56,453.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,121.69 : 98,150.76 = 40,906.98 : x
  2. Step 2: Convert to fraction form
    71,121.69/98,150.76 = 40,906.98/x
  3. Step 3: Cross multiply
    71,121.69x = 98,150.76 × 40,906.98
  4. Step 4: Simplify right side
    71,121.69x = 4,015,051,176.30
  5. Step 5: Solve for x
    x = 4,015,051,176.30/71,121.69
  6. Step 6: Final answer
    x = 56,453.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.