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Finding the Fourth Proportional to 268,768.78, 370,916.22 and 154,066.51

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Solution

The fourth proportional to 268,768.78, 370,916.22 and 154,066.51 is: 212,620.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,768.78 : 370,916.22 = 154,066.51 : x
  2. Step 2: Convert to fraction form
    268,768.78/370,916.22 = 154,066.51/x
  3. Step 3: Cross multiply
    268,768.78x = 370,916.22 × 154,066.51
  4. Step 4: Simplify right side
    268,768.78x = 57,145,767,517.79
  5. Step 5: Solve for x
    x = 57,145,767,517.79/268,768.78
  6. Step 6: Final answer
    x = 212,620.56

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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.