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Finding the Fourth Proportional to 136,654.94, 188,588.49 and 79,289.93

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Solution

The fourth proportional to 136,654.94, 188,588.49 and 79,289.93 is: 109,422.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,654.94 : 188,588.49 = 79,289.93 : x
  2. Step 2: Convert to fraction form
    136,654.94/188,588.49 = 79,289.93/x
  3. Step 3: Cross multiply
    136,654.94x = 188,588.49 × 79,289.93
  4. Step 4: Simplify right side
    136,654.94x = 14,953,168,170.91
  5. Step 5: Solve for x
    x = 14,953,168,170.91/136,654.94
  6. Step 6: Final answer
    x = 109,422.81

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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.