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Finding the Fourth Proportional to 218,477.62, 301,644.12 and 136,928.44

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Solution

The fourth proportional to 218,477.62, 301,644.12 and 136,928.44 is: 189,052.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,477.62 : 301,644.12 = 136,928.44 : x
  2. Step 2: Convert to fraction form
    218,477.62/301,644.12 = 136,928.44/x
  3. Step 3: Cross multiply
    218,477.62x = 301,644.12 × 136,928.44
  4. Step 4: Simplify right side
    218,477.62x = 41,303,658,786.77
  5. Step 5: Solve for x
    x = 41,303,658,786.77/218,477.62
  6. Step 6: Final answer
    x = 189,052.13

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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.