Home / 103,919.08-143,370.66-85,135.72

Finding the Fourth Proportional to 103,919.08, 143,370.66 and 85,135.72

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Solution

The fourth proportional to 103,919.08, 143,370.66 and 85,135.72 is: 117,456.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,919.08 : 143,370.66 = 85,135.72 : x
  2. Step 2: Convert to fraction form
    103,919.08/143,370.66 = 85,135.72/x
  3. Step 3: Cross multiply
    103,919.08x = 143,370.66 × 85,135.72
  4. Step 4: Simplify right side
    103,919.08x = 12,205,964,365.98
  5. Step 5: Solve for x
    x = 12,205,964,365.98/103,919.08
  6. Step 6: Final answer
    x = 117,456.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.