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Finding the Fourth Proportional to 100,308.50, 138,425.73 and 55,596.50

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Solution

The fourth proportional to 100,308.50, 138,425.73 and 55,596.50 is: 76,723.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,308.50 : 138,425.73 = 55,596.50 : x
  2. Step 2: Convert to fraction form
    100,308.50/138,425.73 = 55,596.50/x
  3. Step 3: Cross multiply
    100,308.50x = 138,425.73 × 55,596.50
  4. Step 4: Simplify right side
    100,308.50x = 7,695,986,097.95
  5. Step 5: Solve for x
    x = 7,695,986,097.95/100,308.50
  6. Step 6: Final answer
    x = 76,723.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.