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Finding the Fourth Proportional to 125,891.98, 188,839.96 and 70,086.81

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Solution

The fourth proportional to 125,891.98, 188,839.96 and 70,086.81 is: 105,131.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,891.98 : 188,839.96 = 70,086.81 : x
  2. Step 2: Convert to fraction form
    125,891.98/188,839.96 = 70,086.81/x
  3. Step 3: Cross multiply
    125,891.98x = 188,839.96 × 70,086.81
  4. Step 4: Simplify right side
    125,891.98x = 13,235,190,396.93
  5. Step 5: Solve for x
    x = 13,235,190,396.93/125,891.98
  6. Step 6: Final answer
    x = 105,131.32

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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.