Home / 129,790.50-178,948.62-108,311.19

Finding the Fourth Proportional to 129,790.50, 178,948.62 and 108,311.19

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Solution

The fourth proportional to 129,790.50, 178,948.62 and 108,311.19 is: 149,334.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,790.50 : 178,948.62 = 108,311.19 : x
  2. Step 2: Convert to fraction form
    129,790.50/178,948.62 = 108,311.19/x
  3. Step 3: Cross multiply
    129,790.50x = 178,948.62 × 108,311.19
  4. Step 4: Simplify right side
    129,790.50x = 19,382,137,981.06
  5. Step 5: Solve for x
    x = 19,382,137,981.06/129,790.50
  6. Step 6: Final answer
    x = 149,334.03

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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.