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Finding the Fourth Proportional to 143,512.02, 215,314.16 and 43,691.54

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Solution

The fourth proportional to 143,512.02, 215,314.16 and 43,691.54 is: 65,551.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,512.02 : 215,314.16 = 43,691.54 : x
  2. Step 2: Convert to fraction form
    143,512.02/215,314.16 = 43,691.54/x
  3. Step 3: Cross multiply
    143,512.02x = 215,314.16 × 43,691.54
  4. Step 4: Simplify right side
    143,512.02x = 9,407,405,939.18
  5. Step 5: Solve for x
    x = 9,407,405,939.18/143,512.02
  6. Step 6: Final answer
    x = 65,551.35

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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.