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Finding the Fourth Proportional to 133,345.80, 200,018.70 and 80,857.80

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Solution

The fourth proportional to 133,345.80, 200,018.70 and 80,857.80 is: 121,286.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,345.80 : 200,018.70 = 80,857.80 : x
  2. Step 2: Convert to fraction form
    133,345.80/200,018.70 = 80,857.80/x
  3. Step 3: Cross multiply
    133,345.80x = 200,018.70 × 80,857.80
  4. Step 4: Simplify right side
    133,345.80x = 16,173,072,040.86
  5. Step 5: Solve for x
    x = 16,173,072,040.86/133,345.80
  6. Step 6: Final answer
    x = 121,286.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.