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Finding the Fourth Proportional to 136,900.88, 188,923.87 and 76,474.06

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Solution

The fourth proportional to 136,900.88, 188,923.87 and 76,474.06 is: 105,534.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,900.88 : 188,923.87 = 76,474.06 : x
  2. Step 2: Convert to fraction form
    136,900.88/188,923.87 = 76,474.06/x
  3. Step 3: Cross multiply
    136,900.88x = 188,923.87 × 76,474.06
  4. Step 4: Simplify right side
    136,900.88x = 14,447,775,369.81
  5. Step 5: Solve for x
    x = 14,447,775,369.81/136,900.88
  6. Step 6: Final answer
    x = 105,534.57

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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.