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Finding the Fourth Proportional to 143,685.90, 215,562.36 and 43,845.90

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Solution

The fourth proportional to 143,685.90, 215,562.36 and 43,845.90 is: 65,779.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,685.90 : 215,562.36 = 43,845.90 : x
  2. Step 2: Convert to fraction form
    143,685.90/215,562.36 = 43,845.90/x
  3. Step 3: Cross multiply
    143,685.90x = 215,562.36 × 43,845.90
  4. Step 4: Simplify right side
    143,685.90x = 9,451,525,680.32
  5. Step 5: Solve for x
    x = 9,451,525,680.32/143,685.90
  6. Step 6: Final answer
    x = 65,779.08

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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.