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Finding the Fourth Proportional to 225,990.21, 311,870.31 and 124,025.15

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Solution

The fourth proportional to 225,990.21, 311,870.31 and 124,025.15 is: 171,156.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,990.21 : 311,870.31 = 124,025.15 : x
  2. Step 2: Convert to fraction form
    225,990.21/311,870.31 = 124,025.15/x
  3. Step 3: Cross multiply
    225,990.21x = 311,870.31 × 124,025.15
  4. Step 4: Simplify right side
    225,990.21x = 38,679,763,078.36
  5. Step 5: Solve for x
    x = 38,679,763,078.36/225,990.21
  6. Step 6: Final answer
    x = 171,156.81

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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.