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Finding the Fourth Proportional to 218,380.61, 301,365.11 and 122,887.40

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Solution

The fourth proportional to 218,380.61, 301,365.11 and 122,887.40 is: 169,584.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,380.61 : 301,365.11 = 122,887.40 : x
  2. Step 2: Convert to fraction form
    218,380.61/301,365.11 = 122,887.40/x
  3. Step 3: Cross multiply
    218,380.61x = 301,365.11 × 122,887.40
  4. Step 4: Simplify right side
    218,380.61x = 37,033,973,619.01
  5. Step 5: Solve for x
    x = 37,033,973,619.01/218,380.61
  6. Step 6: Final answer
    x = 169,584.53

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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.