Home / 143,539.49-215,169.55-68,640.21

Finding the Fourth Proportional to 143,539.49, 215,169.55 and 68,640.21

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Solution

The fourth proportional to 143,539.49, 215,169.55 and 68,640.21 is: 102,893.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,539.49 : 215,169.55 = 68,640.21 : x
  2. Step 2: Convert to fraction form
    143,539.49/215,169.55 = 68,640.21/x
  3. Step 3: Cross multiply
    143,539.49x = 215,169.55 × 68,640.21
  4. Step 4: Simplify right side
    143,539.49x = 14,769,282,926.01
  5. Step 5: Solve for x
    x = 14,769,282,926.01/143,539.49
  6. Step 6: Final answer
    x = 102,893.52

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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.