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Finding the Fourth Proportional to 143,409.15, 215,125.11 and 43,578.06

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Solution

The fourth proportional to 143,409.15, 215,125.11 and 43,578.06 is: 65,370.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,409.15 : 215,125.11 = 43,578.06 : x
  2. Step 2: Convert to fraction form
    143,409.15/215,125.11 = 43,578.06/x
  3. Step 3: Cross multiply
    143,409.15x = 215,125.11 × 43,578.06
  4. Step 4: Simplify right side
    143,409.15x = 9,374,734,951.09
  5. Step 5: Solve for x
    x = 9,374,734,951.09/143,409.15
  6. Step 6: Final answer
    x = 65,370.55

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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.