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Finding the Fourth Proportional to 136,418.81, 204,668.71 and 69,905.66

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Solution

The fourth proportional to 136,418.81, 204,668.71 and 69,905.66 is: 104,879.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,418.81 : 204,668.71 = 69,905.66 : x
  2. Step 2: Convert to fraction form
    136,418.81/204,668.71 = 69,905.66/x
  3. Step 3: Cross multiply
    136,418.81x = 204,668.71 × 69,905.66
  4. Step 4: Simplify right side
    136,418.81x = 14,307,500,055.79
  5. Step 5: Solve for x
    x = 14,307,500,055.79/136,418.81
  6. Step 6: Final answer
    x = 104,879.24

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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.