Home / 281,106.33-421,633.37-78,720.75

Finding the Fourth Proportional to 281,106.33, 421,633.37 and 78,720.75

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Solution

The fourth proportional to 281,106.33, 421,633.37 and 78,720.75 is: 118,073.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,106.33 : 421,633.37 = 78,720.75 : x
  2. Step 2: Convert to fraction form
    281,106.33/421,633.37 = 78,720.75/x
  3. Step 3: Cross multiply
    281,106.33x = 421,633.37 × 78,720.75
  4. Step 4: Simplify right side
    281,106.33x = 33,191,294,717.82
  5. Step 5: Solve for x
    x = 33,191,294,717.82/281,106.33
  6. Step 6: Final answer
    x = 118,073.81

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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.