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Finding the Fourth Proportional to 218,418.89, 301,427.76 and 122,931.77

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Solution

The fourth proportional to 218,418.89, 301,427.76 and 122,931.77 is: 169,651.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,418.89 : 301,427.76 = 122,931.77 : x
  2. Step 2: Convert to fraction form
    218,418.89/301,427.76 = 122,931.77/x
  3. Step 3: Cross multiply
    218,418.89x = 301,427.76 × 122,931.77
  4. Step 4: Simplify right side
    218,418.89x = 37,055,046,249.47
  5. Step 5: Solve for x
    x = 37,055,046,249.47/218,418.89
  6. Step 6: Final answer
    x = 169,651.29

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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.