Home / 103,455.40-154,919.58-68,287.72

Finding the Fourth Proportional to 103,455.40, 154,919.58 and 68,287.72

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Solution

The fourth proportional to 103,455.40, 154,919.58 and 68,287.72 is: 102,257.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,455.40 : 154,919.58 = 68,287.72 : x
  2. Step 2: Convert to fraction form
    103,455.40/154,919.58 = 68,287.72/x
  3. Step 3: Cross multiply
    103,455.40x = 154,919.58 × 68,287.72
  4. Step 4: Simplify right side
    103,455.40x = 10,579,104,901.56
  5. Step 5: Solve for x
    x = 10,579,104,901.56/103,455.40
  6. Step 6: Final answer
    x = 102,257.64

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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.