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Finding the Fourth Proportional to 133,471.85, 184,391.15 and 87,640.20

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Solution

The fourth proportional to 133,471.85, 184,391.15 and 87,640.20 is: 121,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,471.85 : 184,391.15 = 87,640.20 : x
  2. Step 2: Convert to fraction form
    133,471.85/184,391.15 = 87,640.20/x
  3. Step 3: Cross multiply
    133,471.85x = 184,391.15 × 87,640.20
  4. Step 4: Simplify right side
    133,471.85x = 16,160,077,264.23
  5. Step 5: Solve for x
    x = 16,160,077,264.23/133,471.85
  6. Step 6: Final answer
    x = 121,074.80

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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.