Home / 78,036.22-117,057.64-30,661.56

Finding the Fourth Proportional to 78,036.22, 117,057.64 and 30,661.56

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Solution

The fourth proportional to 78,036.22, 117,057.64 and 30,661.56 is: 45,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,036.22 : 117,057.64 = 30,661.56 : x
  2. Step 2: Convert to fraction form
    78,036.22/117,057.64 = 30,661.56/x
  3. Step 3: Cross multiply
    78,036.22x = 117,057.64 × 30,661.56
  4. Step 4: Simplify right side
    78,036.22x = 3,589,169,852.32
  5. Step 5: Solve for x
    x = 3,589,169,852.32/78,036.22
  6. Step 6: Final answer
    x = 45,993.64

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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.