Home / 120,405.03-166,270.62-90,137.81

Finding the Fourth Proportional to 120,405.03, 166,270.62 and 90,137.81

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Solution

The fourth proportional to 120,405.03, 166,270.62 and 90,137.81 is: 124,473.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,405.03 : 166,270.62 = 90,137.81 : x
  2. Step 2: Convert to fraction form
    120,405.03/166,270.62 = 90,137.81/x
  3. Step 3: Cross multiply
    120,405.03x = 166,270.62 × 90,137.81
  4. Step 4: Simplify right side
    120,405.03x = 14,987,270,307.84
  5. Step 5: Solve for x
    x = 14,987,270,307.84/120,405.03
  6. Step 6: Final answer
    x = 124,473.79

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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.