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Finding the Fourth Proportional to 51,351.54, 70,866.63 and 28,689.81

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Solution

The fourth proportional to 51,351.54, 70,866.63 and 28,689.81 is: 39,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,351.54 : 70,866.63 = 28,689.81 : x
  2. Step 2: Convert to fraction form
    51,351.54/70,866.63 = 28,689.81/x
  3. Step 3: Cross multiply
    51,351.54x = 70,866.63 × 28,689.81
  4. Step 4: Simplify right side
    51,351.54x = 2,033,150,150.04
  5. Step 5: Solve for x
    x = 2,033,150,150.04/51,351.54
  6. Step 6: Final answer
    x = 39,592.78

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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.