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Finding the Fourth Proportional to 100,755.36, 139,042.62 and 55,433.52

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Solution

The fourth proportional to 100,755.36, 139,042.62 and 55,433.52 is: 76,498.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,755.36 : 139,042.62 = 55,433.52 : x
  2. Step 2: Convert to fraction form
    100,755.36/139,042.62 = 55,433.52/x
  3. Step 3: Cross multiply
    100,755.36x = 139,042.62 × 55,433.52
  4. Step 4: Simplify right side
    100,755.36x = 7,707,621,856.62
  5. Step 5: Solve for x
    x = 7,707,621,856.62/100,755.36
  6. Step 6: Final answer
    x = 76,498.38

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1.5x scale

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.