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Finding the Fourth Proportional to 133,328.70, 200,122.65 and 80,840.70

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Solution

The fourth proportional to 133,328.70, 200,122.65 and 80,840.70 is: 121,339.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,328.70 : 200,122.65 = 80,840.70 : x
  2. Step 2: Convert to fraction form
    133,328.70/200,122.65 = 80,840.70/x
  3. Step 3: Cross multiply
    133,328.70x = 200,122.65 × 80,840.70
  4. Step 4: Simplify right side
    133,328.70x = 16,178,055,111.86
  5. Step 5: Solve for x
    x = 16,178,055,111.86/133,328.70
  6. Step 6: Final answer
    x = 121,339.63

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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.