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Finding the Fourth Proportional to 129,073.48, 178,049.69 and 119,940.12

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Solution

The fourth proportional to 129,073.48, 178,049.69 and 119,940.12 is: 165,450.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,073.48 : 178,049.69 = 119,940.12 : x
  2. Step 2: Convert to fraction form
    129,073.48/178,049.69 = 119,940.12/x
  3. Step 3: Cross multiply
    129,073.48x = 178,049.69 × 119,940.12
  4. Step 4: Simplify right side
    129,073.48x = 21,355,301,029.99
  5. Step 5: Solve for x
    x = 21,355,301,029.99/129,073.48
  6. Step 6: Final answer
    x = 165,450.73

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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.