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Finding the Fourth Proportional to 136,289.61, 188,079.64 and 75,858.95

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Solution

The fourth proportional to 136,289.61, 188,079.64 and 75,858.95 is: 104,685.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,289.61 : 188,079.64 = 75,858.95 : x
  2. Step 2: Convert to fraction form
    136,289.61/188,079.64 = 75,858.95/x
  3. Step 3: Cross multiply
    136,289.61x = 188,079.64 × 75,858.95
  4. Step 4: Simplify right side
    136,289.61x = 14,267,524,287.33
  5. Step 5: Solve for x
    x = 14,267,524,287.33/136,289.61
  6. Step 6: Final answer
    x = 104,685.34

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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.