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Finding the Fourth Proportional to 136,668.78, 188,607.60 and 79,303.77

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Solution

The fourth proportional to 136,668.78, 188,607.60 and 79,303.77 is: 109,441.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,668.78 : 188,607.60 = 79,303.77 : x
  2. Step 2: Convert to fraction form
    136,668.78/188,607.60 = 79,303.77/x
  3. Step 3: Cross multiply
    136,668.78x = 188,607.60 × 79,303.77
  4. Step 4: Simplify right side
    136,668.78x = 14,957,293,730.65
  5. Step 5: Solve for x
    x = 14,957,293,730.65/136,668.78
  6. Step 6: Final answer
    x = 109,441.92

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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.