Home / 120,219.89-165,908.34-66,503.98

Finding the Fourth Proportional to 120,219.89, 165,908.34 and 66,503.98

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Solution

The fourth proportional to 120,219.89, 165,908.34 and 66,503.98 is: 91,778.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,219.89 : 165,908.34 = 66,503.98 : x
  2. Step 2: Convert to fraction form
    120,219.89/165,908.34 = 66,503.98/x
  3. Step 3: Cross multiply
    120,219.89x = 165,908.34 × 66,503.98
  4. Step 4: Simplify right side
    120,219.89x = 11,033,564,592.67
  5. Step 5: Solve for x
    x = 11,033,564,592.67/120,219.89
  6. Step 6: Final answer
    x = 91,778.20

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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.