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Finding the Fourth Proportional to 63,144.54, 87,148.89 and 40,509.09

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Solution

The fourth proportional to 63,144.54, 87,148.89 and 40,509.09 is: 55,908.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,144.54 : 87,148.89 = 40,509.09 : x
  2. Step 2: Convert to fraction form
    63,144.54/87,148.89 = 40,509.09/x
  3. Step 3: Cross multiply
    63,144.54x = 87,148.89 × 40,509.09
  4. Step 4: Simplify right side
    63,144.54x = 3,530,322,228.41
  5. Step 5: Solve for x
    x = 3,530,322,228.41/63,144.54
  6. Step 6: Final answer
    x = 55,908.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.