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Finding the Fourth Proportional to 136,653.94, 188,587.11 and 79,288.93

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Solution

The fourth proportional to 136,653.94, 188,587.11 and 79,288.93 is: 109,421.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,653.94 : 188,587.11 = 79,288.93 : x
  2. Step 2: Convert to fraction form
    136,653.94/188,587.11 = 79,288.93/x
  3. Step 3: Cross multiply
    136,653.94x = 188,587.11 × 79,288.93
  4. Step 4: Simplify right side
    136,653.94x = 14,952,870,163.69
  5. Step 5: Solve for x
    x = 14,952,870,163.69/136,653.94
  6. Step 6: Final answer
    x = 109,421.43

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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.