Home / 129,180.38-178,285.64-72,591.75

Finding the Fourth Proportional to 129,180.38, 178,285.64 and 72,591.75

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Solution

The fourth proportional to 129,180.38, 178,285.64 and 72,591.75 is: 100,186.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,180.38 : 178,285.64 = 72,591.75 : x
  2. Step 2: Convert to fraction form
    129,180.38/178,285.64 = 72,591.75/x
  3. Step 3: Cross multiply
    129,180.38x = 178,285.64 × 72,591.75
  4. Step 4: Simplify right side
    129,180.38x = 12,942,066,244.51
  5. Step 5: Solve for x
    x = 12,942,066,244.51/129,180.38
  6. Step 6: Final answer
    x = 100,186.01

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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.