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Finding the Fourth Proportional to 120,791.79, 181,191.47 and 57,618.77

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Solution

The fourth proportional to 120,791.79, 181,191.47 and 57,618.77 is: 86,429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,791.79 : 181,191.47 = 57,618.77 : x
  2. Step 2: Convert to fraction form
    120,791.79/181,191.47 = 57,618.77/x
  3. Step 3: Cross multiply
    120,791.79x = 181,191.47 × 57,618.77
  4. Step 4: Simplify right side
    120,791.79x = 10,440,028,441.84
  5. Step 5: Solve for x
    x = 10,440,028,441.84/120,791.79
  6. Step 6: Final answer
    x = 86,429.95

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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.