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Finding the Fourth Proportional to 113,486.40, 171,079.44 and 105,874.56

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Solution

The fourth proportional to 113,486.40, 171,079.44 and 105,874.56 is: 159,604.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,486.40 : 171,079.44 = 105,874.56 : x
  2. Step 2: Convert to fraction form
    113,486.40/171,079.44 = 105,874.56/x
  3. Step 3: Cross multiply
    113,486.40x = 171,079.44 × 105,874.56
  4. Step 4: Simplify right side
    113,486.40x = 18,112,960,435.05
  5. Step 5: Solve for x
    x = 18,112,960,435.05/113,486.40
  6. Step 6: Final answer
    x = 159,604.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.