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Finding the Fourth Proportional to 218,429.84, 301,442.88 and 122,942.72

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Solution

The fourth proportional to 218,429.84, 301,442.88 and 122,942.72 is: 169,666.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,429.84 : 301,442.88 = 122,942.72 : x
  2. Step 2: Convert to fraction form
    218,429.84/301,442.88 = 122,942.72/x
  3. Step 3: Cross multiply
    218,429.84x = 301,442.88 × 122,942.72
  4. Step 4: Simplify right side
    218,429.84x = 37,060,207,591.83
  5. Step 5: Solve for x
    x = 37,060,207,591.83/218,429.84
  6. Step 6: Final answer
    x = 169,666.41

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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.