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Finding the Fourth Proportional to 71,010.82, 106,530.80 and 28,890.79

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Solution

The fourth proportional to 71,010.82, 106,530.80 and 28,890.79 is: 43,342.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,010.82 : 106,530.80 = 28,890.79 : x
  2. Step 2: Convert to fraction form
    71,010.82/106,530.80 = 28,890.79/x
  3. Step 3: Cross multiply
    71,010.82x = 106,530.80 × 28,890.79
  4. Step 4: Simplify right side
    71,010.82x = 3,077,758,971.33
  5. Step 5: Solve for x
    x = 3,077,758,971.33/71,010.82
  6. Step 6: Final answer
    x = 43,342.11

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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.