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Finding the Fourth Proportional to 143,817.41, 215,679.16 and 47,728.81

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Solution

The fourth proportional to 143,817.41, 215,679.16 and 47,728.81 is: 71,577.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,817.41 : 215,679.16 = 47,728.81 : x
  2. Step 2: Convert to fraction form
    143,817.41/215,679.16 = 47,728.81/x
  3. Step 3: Cross multiply
    143,817.41x = 215,679.16 × 47,728.81
  4. Step 4: Simplify right side
    143,817.41x = 10,294,109,977.86
  5. Step 5: Solve for x
    x = 10,294,109,977.86/143,817.41
  6. Step 6: Final answer
    x = 71,577.63

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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.