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Finding the Fourth Proportional to 67,651.28, 101,465.40 and 20,891.60

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Solution

The fourth proportional to 67,651.28, 101,465.40 and 20,891.60 is: 31,333.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,651.28 : 101,465.40 = 20,891.60 : x
  2. Step 2: Convert to fraction form
    67,651.28/101,465.40 = 20,891.60/x
  3. Step 3: Cross multiply
    67,651.28x = 101,465.40 × 20,891.60
  4. Step 4: Simplify right side
    67,651.28x = 2,119,774,550.64
  5. Step 5: Solve for x
    x = 2,119,774,550.64/67,651.28
  6. Step 6: Final answer
    x = 31,333.84

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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.