Home / 129,550.56-178,780.48-81,825.28

Finding the Fourth Proportional to 129,550.56, 178,780.48 and 81,825.28

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Solution

The fourth proportional to 129,550.56, 178,780.48 and 81,825.28 is: 112,919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,550.56 : 178,780.48 = 81,825.28 : x
  2. Step 2: Convert to fraction form
    129,550.56/178,780.48 = 81,825.28/x
  3. Step 3: Cross multiply
    129,550.56x = 178,780.48 × 81,825.28
  4. Step 4: Simplify right side
    129,550.56x = 14,628,762,834.53
  5. Step 5: Solve for x
    x = 14,628,762,834.53/129,550.56
  6. Step 6: Final answer
    x = 112,919.33

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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.