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Finding the Fourth Proportional to 143,686.90, 215,563.86 and 43,846.90

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Solution

The fourth proportional to 143,686.90, 215,563.86 and 43,846.90 is: 65,780.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,686.90 : 215,563.86 = 43,846.90 : x
  2. Step 2: Convert to fraction form
    143,686.90/215,563.86 = 43,846.90/x
  3. Step 3: Cross multiply
    143,686.90x = 215,563.86 × 43,846.90
  4. Step 4: Simplify right side
    143,686.90x = 9,451,807,013.03
  5. Step 5: Solve for x
    x = 9,451,807,013.03/143,686.90
  6. Step 6: Final answer
    x = 65,780.58

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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.