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Finding the Fourth Proportional to 71,690.73, 107,530.69 and 28,998.87

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Solution

The fourth proportional to 71,690.73, 107,530.69 and 28,998.87 is: 43,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,690.73 : 107,530.69 = 28,998.87 : x
  2. Step 2: Convert to fraction form
    71,690.73/107,530.69 = 28,998.87/x
  3. Step 3: Cross multiply
    71,690.73x = 107,530.69 × 28,998.87
  4. Step 4: Simplify right side
    71,690.73x = 3,118,267,890.17
  5. Step 5: Solve for x
    x = 3,118,267,890.17/71,690.73
  6. Step 6: Final answer
    x = 43,496.11

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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.