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Finding the Fourth Proportional to 144,041.80, 215,879.10 and 80,861.80

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Solution

The fourth proportional to 144,041.80, 215,879.10 and 80,861.80 is: 121,189.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,041.80 : 215,879.10 = 80,861.80 : x
  2. Step 2: Convert to fraction form
    144,041.80/215,879.10 = 80,861.80/x
  3. Step 3: Cross multiply
    144,041.80x = 215,879.10 × 80,861.80
  4. Step 4: Simplify right side
    144,041.80x = 17,456,372,608.38
  5. Step 5: Solve for x
    x = 17,456,372,608.38/144,041.80
  6. Step 6: Final answer
    x = 121,189.63

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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.