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Finding the Fourth Proportional to 268,990.73, 403,391.79 and 79,400.51

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Solution

The fourth proportional to 268,990.73, 403,391.79 and 79,400.51 is: 119,072.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,990.73 : 403,391.79 = 79,400.51 : x
  2. Step 2: Convert to fraction form
    268,990.73/403,391.79 = 79,400.51/x
  3. Step 3: Cross multiply
    268,990.73x = 403,391.79 × 79,400.51
  4. Step 4: Simplify right side
    268,990.73x = 32,029,513,855.81
  5. Step 5: Solve for x
    x = 32,029,513,855.81/268,990.73
  6. Step 6: Final answer
    x = 119,072.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.