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Finding the Fourth Proportional to 51,391.33, 70,913.16 and 28,727.48

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Solution

The fourth proportional to 51,391.33, 70,913.16 and 28,727.48 is: 39,640.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,391.33 : 70,913.16 = 28,727.48 : x
  2. Step 2: Convert to fraction form
    51,391.33/70,913.16 = 28,727.48/x
  3. Step 3: Cross multiply
    51,391.33x = 70,913.16 × 28,727.48
  4. Step 4: Simplify right side
    51,391.33x = 2,037,156,562.92
  5. Step 5: Solve for x
    x = 2,037,156,562.92/51,391.33
  6. Step 6: Final answer
    x = 39,640.08

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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.