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Finding the Fourth Proportional to 218,485.14, 301,505.07 and 122,989.74

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Solution

The fourth proportional to 218,485.14, 301,505.07 and 122,989.74 is: 169,723.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,485.14 : 301,505.07 = 122,989.74 : x
  2. Step 2: Convert to fraction form
    218,485.14/301,505.07 = 122,989.74/x
  3. Step 3: Cross multiply
    218,485.14x = 301,505.07 × 122,989.74
  4. Step 4: Simplify right side
    218,485.14x = 37,082,030,167.98
  5. Step 5: Solve for x
    x = 37,082,030,167.98/218,485.14
  6. Step 6: Final answer
    x = 169,723.35

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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.