Home / 68,278.12-102,431.10-38,709.16

Finding the Fourth Proportional to 68,278.12, 102,431.10 and 38,709.16

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Solution

The fourth proportional to 68,278.12, 102,431.10 and 38,709.16 is: 58,071.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,278.12 : 102,431.10 = 38,709.16 : x
  2. Step 2: Convert to fraction form
    68,278.12/102,431.10 = 38,709.16/x
  3. Step 3: Cross multiply
    68,278.12x = 102,431.10 × 38,709.16
  4. Step 4: Simplify right side
    68,278.12x = 3,965,021,838.88
  5. Step 5: Solve for x
    x = 3,965,021,838.88/68,278.12
  6. Step 6: Final answer
    x = 58,071.63

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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.