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Finding the Fourth Proportional to 143,876.60, 215,523.30 and 81,474.20

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Solution

The fourth proportional to 143,876.60, 215,523.30 and 81,474.20 is: 122,046.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,876.60 : 215,523.30 = 81,474.20 : x
  2. Step 2: Convert to fraction form
    143,876.60/215,523.30 = 81,474.20/x
  3. Step 3: Cross multiply
    143,876.60x = 215,523.30 × 81,474.20
  4. Step 4: Simplify right side
    143,876.60x = 17,559,588,448.86
  5. Step 5: Solve for x
    x = 17,559,588,448.86/143,876.60
  6. Step 6: Final answer
    x = 122,046.17

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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.