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Finding the Fourth Proportional to 51,437.70, 70,990.56 and 28,777.95

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Solution

The fourth proportional to 51,437.70, 70,990.56 and 28,777.95 is: 39,717.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,437.70 : 70,990.56 = 28,777.95 : x
  2. Step 2: Convert to fraction form
    51,437.70/70,990.56 = 28,777.95/x
  3. Step 3: Cross multiply
    51,437.70x = 70,990.56 × 28,777.95
  4. Step 4: Simplify right side
    51,437.70x = 2,042,962,786.15
  5. Step 5: Solve for x
    x = 2,042,962,786.15/51,437.70
  6. Step 6: Final answer
    x = 39,717.23

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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.