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Finding the Fourth Proportional to 143,620.78, 215,331.24 and 63,615.32

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Solution

The fourth proportional to 143,620.78, 215,331.24 and 63,615.32 is: 95,378.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,620.78 : 215,331.24 = 63,615.32 : x
  2. Step 2: Convert to fraction form
    143,620.78/215,331.24 = 63,615.32/x
  3. Step 3: Cross multiply
    143,620.78x = 215,331.24 × 63,615.32
  4. Step 4: Simplify right side
    143,620.78x = 13,698,365,738.60
  5. Step 5: Solve for x
    x = 13,698,365,738.60/143,620.78
  6. Step 6: Final answer
    x = 95,378.72

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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.