Home / 129,143.14-178,145.58-120,009.82

Finding the Fourth Proportional to 129,143.14, 178,145.58 and 120,009.82

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Solution

The fourth proportional to 129,143.14, 178,145.58 and 120,009.82 is: 165,546.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,143.14 : 178,145.58 = 120,009.82 : x
  2. Step 2: Convert to fraction form
    129,143.14/178,145.58 = 120,009.82/x
  3. Step 3: Cross multiply
    129,143.14x = 178,145.58 × 120,009.82
  4. Step 4: Simplify right side
    129,143.14x = 21,379,218,989.60
  5. Step 5: Solve for x
    x = 21,379,218,989.60/129,143.14
  6. Step 6: Final answer
    x = 165,546.69

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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.