Home / 100,755.83-139,043.04-55,432.85

Finding the Fourth Proportional to 100,755.83, 139,043.04 and 55,432.85

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Solution

The fourth proportional to 100,755.83, 139,043.04 and 55,432.85 is: 76,497.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,755.83 : 139,043.04 = 55,432.85 : x
  2. Step 2: Convert to fraction form
    100,755.83/139,043.04 = 55,432.85/x
  3. Step 3: Cross multiply
    100,755.83x = 139,043.04 × 55,432.85
  4. Step 4: Simplify right side
    100,755.83x = 7,707,551,979.86
  5. Step 5: Solve for x
    x = 7,707,551,979.86/100,755.83
  6. Step 6: Final answer
    x = 76,497.33

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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.