Home / 102,705.78-141,719.87-57,378.14

Finding the Fourth Proportional to 102,705.78, 141,719.87 and 57,378.14

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Solution

The fourth proportional to 102,705.78, 141,719.87 and 57,378.14 is: 79,173.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,705.78 : 141,719.87 = 57,378.14 : x
  2. Step 2: Convert to fraction form
    102,705.78/141,719.87 = 57,378.14/x
  3. Step 3: Cross multiply
    102,705.78x = 141,719.87 × 57,378.14
  4. Step 4: Simplify right side
    102,705.78x = 8,131,621,546.15
  5. Step 5: Solve for x
    x = 8,131,621,546.15/102,705.78
  6. Step 6: Final answer
    x = 79,173.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.