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Finding the Fourth Proportional to 103,373.28, 142,709.31 and 69,559.56

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Solution

The fourth proportional to 103,373.28, 142,709.31 and 69,559.56 is: 96,028.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,373.28 : 142,709.31 = 69,559.56 : x
  2. Step 2: Convert to fraction form
    103,373.28/142,709.31 = 69,559.56/x
  3. Step 3: Cross multiply
    103,373.28x = 142,709.31 × 69,559.56
  4. Step 4: Simplify right side
    103,373.28x = 9,926,796,811.50
  5. Step 5: Solve for x
    x = 9,926,796,811.50/103,373.28
  6. Step 6: Final answer
    x = 96,028.65

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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.