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Finding the Fourth Proportional to 75,138.67, 103,696.36 and 43,309.62

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Solution

The fourth proportional to 75,138.67, 103,696.36 and 43,309.62 is: 59,770.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,138.67 : 103,696.36 = 43,309.62 : x
  2. Step 2: Convert to fraction form
    75,138.67/103,696.36 = 43,309.62/x
  3. Step 3: Cross multiply
    75,138.67x = 103,696.36 × 43,309.62
  4. Step 4: Simplify right side
    75,138.67x = 4,491,049,946.98
  5. Step 5: Solve for x
    x = 4,491,049,946.98/75,138.67
  6. Step 6: Final answer
    x = 59,770.15

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1.5x scale

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.