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Finding the Fourth Proportional to 218,453.39, 301,446.45 and 121,649.93

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Solution

The fourth proportional to 218,453.39, 301,446.45 and 121,649.93 is: 167,866.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,453.39 : 301,446.45 = 121,649.93 : x
  2. Step 2: Convert to fraction form
    218,453.39/301,446.45 = 121,649.93/x
  3. Step 3: Cross multiply
    218,453.39x = 301,446.45 × 121,649.93
  4. Step 4: Simplify right side
    218,453.39x = 36,670,939,541.25
  5. Step 5: Solve for x
    x = 36,670,939,541.25/218,453.39
  6. Step 6: Final answer
    x = 167,866.20

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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.