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Finding the Fourth Proportional to 138,243.55, 207,401.54 and 43,469.91

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Solution

The fourth proportional to 138,243.55, 207,401.54 and 43,469.91 is: 65,216.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,243.55 : 207,401.54 = 43,469.91 : x
  2. Step 2: Convert to fraction form
    138,243.55/207,401.54 = 43,469.91/x
  3. Step 3: Cross multiply
    138,243.55x = 207,401.54 × 43,469.91
  4. Step 4: Simplify right side
    138,243.55x = 9,015,726,277.66
  5. Step 5: Solve for x
    x = 9,015,726,277.66/138,243.55
  6. Step 6: Final answer
    x = 65,216.25

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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.