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Finding the Fourth Proportional to 69,318.81, 103,970.21 and 19,402.88

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Solution

The fourth proportional to 69,318.81, 103,970.21 and 19,402.88 is: 29,102.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,318.81 : 103,970.21 = 19,402.88 : x
  2. Step 2: Convert to fraction form
    69,318.81/103,970.21 = 19,402.88/x
  3. Step 3: Cross multiply
    69,318.81x = 103,970.21 × 19,402.88
  4. Step 4: Simplify right side
    69,318.81x = 2,017,320,891.34
  5. Step 5: Solve for x
    x = 2,017,320,891.34/69,318.81
  6. Step 6: Final answer
    x = 29,102.07

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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.