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Finding the Fourth Proportional to 143,640.87, 215,311.63 and 80,368.23

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Solution

The fourth proportional to 143,640.87, 215,311.63 and 80,368.23 is: 120,468.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,640.87 : 215,311.63 = 80,368.23 : x
  2. Step 2: Convert to fraction form
    143,640.87/215,311.63 = 80,368.23/x
  3. Step 3: Cross multiply
    143,640.87x = 215,311.63 × 80,368.23
  4. Step 4: Simplify right side
    143,640.87x = 17,304,213,655.03
  5. Step 5: Solve for x
    x = 17,304,213,655.03/143,640.87
  6. Step 6: Final answer
    x = 120,468.59

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1.5x scale

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.