Home / 68,921.28-103,308.21-45,219.87

Finding the Fourth Proportional to 68,921.28, 103,308.21 and 45,219.87

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Solution

The fourth proportional to 68,921.28, 103,308.21 and 45,219.87 is: 67,781.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,921.28 : 103,308.21 = 45,219.87 : x
  2. Step 2: Convert to fraction form
    68,921.28/103,308.21 = 45,219.87/x
  3. Step 3: Cross multiply
    68,921.28x = 103,308.21 × 45,219.87
  4. Step 4: Simplify right side
    68,921.28x = 4,671,583,826.13
  5. Step 5: Solve for x
    x = 4,671,583,826.13/68,921.28
  6. Step 6: Final answer
    x = 67,781.44

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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.