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Finding the Fourth Proportional to 119,287.01, 164,494.04 and 78,986.07

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Solution

The fourth proportional to 119,287.01, 164,494.04 and 78,986.07 is: 108,919.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,287.01 : 164,494.04 = 78,986.07 : x
  2. Step 2: Convert to fraction form
    119,287.01/164,494.04 = 78,986.07/x
  3. Step 3: Cross multiply
    119,287.01x = 164,494.04 × 78,986.07
  4. Step 4: Simplify right side
    119,287.01x = 12,992,737,363.09
  5. Step 5: Solve for x
    x = 12,992,737,363.09/119,287.01
  6. Step 6: Final answer
    x = 108,919.97

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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.