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Finding the Fourth Proportional to 143,630.78, 215,460.90 and 54,958.86

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Solution

The fourth proportional to 143,630.78, 215,460.90 and 54,958.86 is: 82,443.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,630.78 : 215,460.90 = 54,958.86 : x
  2. Step 2: Convert to fraction form
    143,630.78/215,460.90 = 54,958.86/x
  3. Step 3: Cross multiply
    143,630.78x = 215,460.90 × 54,958.86
  4. Step 4: Simplify right side
    143,630.78x = 11,841,485,438.57
  5. Step 5: Solve for x
    x = 11,841,485,438.57/143,630.78
  6. Step 6: Final answer
    x = 82,443.93

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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.