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Finding the Fourth Proportional to 68,689.20, 103,073.49 and 37,099.86

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Solution

The fourth proportional to 68,689.20, 103,073.49 and 37,099.86 is: 55,671.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,689.20 : 103,073.49 = 37,099.86 : x
  2. Step 2: Convert to fraction form
    68,689.20/103,073.49 = 37,099.86/x
  3. Step 3: Cross multiply
    68,689.20x = 103,073.49 × 37,099.86
  4. Step 4: Simplify right side
    68,689.20x = 3,824,012,048.71
  5. Step 5: Solve for x
    x = 3,824,012,048.71/68,689.20
  6. Step 6: Final answer
    x = 55,671.23

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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.