Home / 68,129.64-102,198.78-21,384.36

Finding the Fourth Proportional to 68,129.64, 102,198.78 and 21,384.36

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Solution

The fourth proportional to 68,129.64, 102,198.78 and 21,384.36 is: 32,077.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,129.64 : 102,198.78 = 21,384.36 : x
  2. Step 2: Convert to fraction form
    68,129.64/102,198.78 = 21,384.36/x
  3. Step 3: Cross multiply
    68,129.64x = 102,198.78 × 21,384.36
  4. Step 4: Simplify right side
    68,129.64x = 2,185,455,503.08
  5. Step 5: Solve for x
    x = 2,185,455,503.08/68,129.64
  6. Step 6: Final answer
    x = 32,077.90

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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.