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Finding the Fourth Proportional to 143,642.70, 215,464.14 and 68,745.24

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Solution

The fourth proportional to 143,642.70, 215,464.14 and 68,745.24 is: 103,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,642.70 : 215,464.14 = 68,745.24 : x
  2. Step 2: Convert to fraction form
    143,642.70/215,464.14 = 68,745.24/x
  3. Step 3: Cross multiply
    143,642.70x = 215,464.14 × 68,745.24
  4. Step 4: Simplify right side
    143,642.70x = 14,812,134,015.69
  5. Step 5: Solve for x
    x = 14,812,134,015.69/143,642.70
  6. Step 6: Final answer
    x = 103,117.90

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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.