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Finding the Fourth Proportional to 215,950.40, 324,071.40 and 121,180.40

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Solution

The fourth proportional to 215,950.40, 324,071.40 and 121,180.40 is: 181,852.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,950.40 : 324,071.40 = 121,180.40 : x
  2. Step 2: Convert to fraction form
    215,950.40/324,071.40 = 121,180.40/x
  3. Step 3: Cross multiply
    215,950.40x = 324,071.40 × 121,180.40
  4. Step 4: Simplify right side
    215,950.40x = 39,271,101,880.56
  5. Step 5: Solve for x
    x = 39,271,101,880.56/215,950.40
  6. Step 6: Final answer
    x = 181,852.42

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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.