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Finding the Fourth Proportional to 51,645.56, 71,265.02 and 28,979.87

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Solution

The fourth proportional to 51,645.56, 71,265.02 and 28,979.87 is: 39,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,645.56 : 71,265.02 = 28,979.87 : x
  2. Step 2: Convert to fraction form
    51,645.56/71,265.02 = 28,979.87/x
  3. Step 3: Cross multiply
    51,645.56x = 71,265.02 × 28,979.87
  4. Step 4: Simplify right side
    51,645.56x = 2,065,250,513.92
  5. Step 5: Solve for x
    x = 2,065,250,513.92/51,645.56
  6. Step 6: Final answer
    x = 39,988.93

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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.