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Finding the Fourth Proportional to 69,116.37, 103,664.12 and 19,191.21

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Solution

The fourth proportional to 69,116.37, 103,664.12 and 19,191.21 is: 28,783.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,116.37 : 103,664.12 = 19,191.21 : x
  2. Step 2: Convert to fraction form
    69,116.37/103,664.12 = 19,191.21/x
  3. Step 3: Cross multiply
    69,116.37x = 103,664.12 × 19,191.21
  4. Step 4: Simplify right side
    69,116.37x = 1,989,439,800.43
  5. Step 5: Solve for x
    x = 1,989,439,800.43/69,116.37
  6. Step 6: Final answer
    x = 28,783.92

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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.