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Finding the Fourth Proportional to 143,612.56, 215,450.82 and 43,780.51

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Solution

The fourth proportional to 143,612.56, 215,450.82 and 43,780.51 is: 65,680.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,612.56 : 215,450.82 = 43,780.51 : x
  2. Step 2: Convert to fraction form
    143,612.56/215,450.82 = 43,780.51/x
  3. Step 3: Cross multiply
    143,612.56x = 215,450.82 × 43,780.51
  4. Step 4: Simplify right side
    143,612.56x = 9,432,546,779.52
  5. Step 5: Solve for x
    x = 9,432,546,779.52/143,612.56
  6. Step 6: Final answer
    x = 65,680.51

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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.