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Finding the Fourth Proportional to 69,121.64, 103,700.58 and 21,734.81

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Solution

The fourth proportional to 69,121.64, 103,700.58 and 21,734.81 is: 32,607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,121.64 : 103,700.58 = 21,734.81 : x
  2. Step 2: Convert to fraction form
    69,121.64/103,700.58 = 21,734.81/x
  3. Step 3: Cross multiply
    69,121.64x = 103,700.58 × 21,734.81
  4. Step 4: Simplify right side
    69,121.64x = 2,253,911,884.69
  5. Step 5: Solve for x
    x = 2,253,911,884.69/69,121.64
  6. Step 6: Final answer
    x = 32,607.91

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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.