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Finding the Fourth Proportional to 71,954.68, 99,290.22 and 40,120.60

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Solution

The fourth proportional to 71,954.68, 99,290.22 and 40,120.60 is: 55,362.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,954.68 : 99,290.22 = 40,120.60 : x
  2. Step 2: Convert to fraction form
    71,954.68/99,290.22 = 40,120.60/x
  3. Step 3: Cross multiply
    71,954.68x = 99,290.22 × 40,120.60
  4. Step 4: Simplify right side
    71,954.68x = 3,983,583,200.53
  5. Step 5: Solve for x
    x = 3,983,583,200.53/71,954.68
  6. Step 6: Final answer
    x = 55,362.39

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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.