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Finding the Fourth Proportional to 138,410.55, 207,615.96 and 38,571.03

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Solution

The fourth proportional to 138,410.55, 207,615.96 and 38,571.03 is: 57,856.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,410.55 : 207,615.96 = 38,571.03 : x
  2. Step 2: Convert to fraction form
    138,410.55/207,615.96 = 38,571.03/x
  3. Step 3: Cross multiply
    138,410.55x = 207,615.96 × 38,571.03
  4. Step 4: Simplify right side
    138,410.55x = 8,007,961,421.64
  5. Step 5: Solve for x
    x = 8,007,961,421.64/138,410.55
  6. Step 6: Final answer
    x = 57,856.58

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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.