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Finding the Fourth Proportional to 218,172.21, 301,066.65 and 122,673.21

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Solution

The fourth proportional to 218,172.21, 301,066.65 and 122,673.21 is: 169,282.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,172.21 : 301,066.65 = 122,673.21 : x
  2. Step 2: Convert to fraction form
    218,172.21/301,066.65 = 122,673.21/x
  3. Step 3: Cross multiply
    218,172.21x = 301,066.65 × 122,673.21
  4. Step 4: Simplify right side
    218,172.21x = 36,932,812,379.45
  5. Step 5: Solve for x
    x = 36,932,812,379.45/218,172.21
  6. Step 6: Final answer
    x = 169,282.84

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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.