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Finding the Fourth Proportional to 68,710.76, 103,063.44 and 28,719.41

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Solution

The fourth proportional to 68,710.76, 103,063.44 and 28,719.41 is: 43,077.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,710.76 : 103,063.44 = 28,719.41 : x
  2. Step 2: Convert to fraction form
    68,710.76/103,063.44 = 28,719.41/x
  3. Step 3: Cross multiply
    68,710.76x = 103,063.44 × 28,719.41
  4. Step 4: Simplify right side
    68,710.76x = 2,959,921,189.37
  5. Step 5: Solve for x
    x = 2,959,921,189.37/68,710.76
  6. Step 6: Final answer
    x = 43,077.99

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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.