Home / 103,918.83-143,370.32-85,135.47

Finding the Fourth Proportional to 103,918.83, 143,370.32 and 85,135.47

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Solution

The fourth proportional to 103,918.83, 143,370.32 and 85,135.47 is: 117,456.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,918.83 : 143,370.32 = 85,135.47 : x
  2. Step 2: Convert to fraction form
    103,918.83/143,370.32 = 85,135.47/x
  3. Step 3: Cross multiply
    103,918.83x = 143,370.32 × 85,135.47
  4. Step 4: Simplify right side
    103,918.83x = 12,205,899,151.57
  5. Step 5: Solve for x
    x = 12,205,899,151.57/103,918.83
  6. Step 6: Final answer
    x = 117,456.09

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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.