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Finding the Fourth Proportional to 144,039.80, 215,876.10 and 80,859.80

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Solution

The fourth proportional to 144,039.80, 215,876.10 and 80,859.80 is: 121,186.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,039.80 : 215,876.10 = 80,859.80 : x
  2. Step 2: Convert to fraction form
    144,039.80/215,876.10 = 80,859.80/x
  3. Step 3: Cross multiply
    144,039.80x = 215,876.10 × 80,859.80
  4. Step 4: Simplify right side
    144,039.80x = 17,455,698,270.78
  5. Step 5: Solve for x
    x = 17,455,698,270.78/144,039.80
  6. Step 6: Final answer
    x = 121,186.63

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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.