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Finding the Fourth Proportional to 268,989.73, 403,390.29 and 79,399.51

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Solution

The fourth proportional to 268,989.73, 403,390.29 and 79,399.51 is: 119,071.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,989.73 : 403,390.29 = 79,399.51 : x
  2. Step 2: Convert to fraction form
    268,989.73/403,390.29 = 79,399.51/x
  3. Step 3: Cross multiply
    268,989.73x = 403,390.29 × 79,399.51
  4. Step 4: Simplify right side
    268,989.73x = 32,028,991,364.76
  5. Step 5: Solve for x
    x = 32,028,991,364.76/268,989.73
  6. Step 6: Final answer
    x = 119,071.43

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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.