Home / 102,631.44-141,711.48-78,720.24

Finding the Fourth Proportional to 102,631.44, 141,711.48 and 78,720.24

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Solution

The fourth proportional to 102,631.44, 141,711.48 and 78,720.24 is: 108,695.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,631.44 : 141,711.48 = 78,720.24 : x
  2. Step 2: Convert to fraction form
    102,631.44/141,711.48 = 78,720.24/x
  3. Step 3: Cross multiply
    102,631.44x = 141,711.48 × 78,720.24
  4. Step 4: Simplify right side
    102,631.44x = 11,155,561,716.36
  5. Step 5: Solve for x
    x = 11,155,561,716.36/102,631.44
  6. Step 6: Final answer
    x = 108,695.36

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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.