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Finding the Fourth Proportional to 143,920.20, 215,860.86 and 38,745.48

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Solution

The fourth proportional to 143,920.20, 215,860.86 and 38,745.48 is: 58,112.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,920.20 : 215,860.86 = 38,745.48 : x
  2. Step 2: Convert to fraction form
    143,920.20/215,860.86 = 38,745.48/x
  3. Step 3: Cross multiply
    143,920.20x = 215,860.86 × 38,745.48
  4. Step 4: Simplify right side
    143,920.20x = 8,363,632,633.91
  5. Step 5: Solve for x
    x = 8,363,632,633.91/143,920.20
  6. Step 6: Final answer
    x = 58,112.99

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1.5x scale

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.