Home / 221,090.14-331,705.31-78,932.36

Finding the Fourth Proportional to 221,090.14, 331,705.31 and 78,932.36

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Solution

The fourth proportional to 221,090.14, 331,705.31 and 78,932.36 is: 118,423.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,090.14 : 331,705.31 = 78,932.36 : x
  2. Step 2: Convert to fraction form
    221,090.14/331,705.31 = 78,932.36/x
  3. Step 3: Cross multiply
    221,090.14x = 331,705.31 × 78,932.36
  4. Step 4: Simplify right side
    221,090.14x = 26,182,283,969.43
  5. Step 5: Solve for x
    x = 26,182,283,969.43/221,090.14
  6. Step 6: Final answer
    x = 118,423.57

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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.