Home / 221,133.21-331,503.37-86,165.98

Finding the Fourth Proportional to 221,133.21, 331,503.37 and 86,165.98

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Solution

The fourth proportional to 221,133.21, 331,503.37 and 86,165.98 is: 129,172.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,133.21 : 331,503.37 = 86,165.98 : x
  2. Step 2: Convert to fraction form
    221,133.21/331,503.37 = 86,165.98/x
  3. Step 3: Cross multiply
    221,133.21x = 331,503.37 × 86,165.98
  4. Step 4: Simplify right side
    221,133.21x = 28,564,311,705.18
  5. Step 5: Solve for x
    x = 28,564,311,705.18/221,133.21
  6. Step 6: Final answer
    x = 129,172.42

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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.