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Finding the Fourth Proportional to 138,410.70, 207,270.44 and 91,409.10

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Solution

The fourth proportional to 138,410.70, 207,270.44 and 91,409.10 is: 136,885.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,410.70 : 207,270.44 = 91,409.10 : x
  2. Step 2: Convert to fraction form
    138,410.70/207,270.44 = 91,409.10/x
  3. Step 3: Cross multiply
    138,410.70x = 207,270.44 × 91,409.10
  4. Step 4: Simplify right side
    138,410.70x = 18,946,404,377.00
  5. Step 5: Solve for x
    x = 18,946,404,377.00/138,410.70
  6. Step 6: Final answer
    x = 136,885.40

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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.