Home / 154,395.20-231,474.24-78,431.36

Finding the Fourth Proportional to 154,395.20, 231,474.24 and 78,431.36

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Solution

The fourth proportional to 154,395.20, 231,474.24 and 78,431.36 is: 117,586.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,395.20 : 231,474.24 = 78,431.36 : x
  2. Step 2: Convert to fraction form
    154,395.20/231,474.24 = 78,431.36/x
  3. Step 3: Cross multiply
    154,395.20x = 231,474.24 × 78,431.36
  4. Step 4: Simplify right side
    154,395.20x = 18,154,839,448.17
  5. Step 5: Solve for x
    x = 18,154,839,448.17/154,395.20
  6. Step 6: Final answer
    x = 117,586.81

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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.