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Finding the Fourth Proportional to 121,399.56, 166,640.09 and 107,670.67

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Solution

The fourth proportional to 121,399.56, 166,640.09 and 107,670.67 is: 147,795.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,399.56 : 166,640.09 = 107,670.67 : x
  2. Step 2: Convert to fraction form
    121,399.56/166,640.09 = 107,670.67/x
  3. Step 3: Cross multiply
    121,399.56x = 166,640.09 × 107,670.67
  4. Step 4: Simplify right side
    121,399.56x = 17,942,249,184.21
  5. Step 5: Solve for x
    x = 17,942,249,184.21/121,399.56
  6. Step 6: Final answer
    x = 147,795.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.