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Finding the Fourth Proportional to 136,719.03, 188,672.04 and 76,286.01

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Solution

The fourth proportional to 136,719.03, 188,672.04 and 76,286.01 is: 105,274.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,719.03 : 188,672.04 = 76,286.01 : x
  2. Step 2: Convert to fraction form
    136,719.03/188,672.04 = 76,286.01/x
  3. Step 3: Cross multiply
    136,719.03x = 188,672.04 × 76,286.01
  4. Step 4: Simplify right side
    136,719.03x = 14,393,037,130.16
  5. Step 5: Solve for x
    x = 14,393,037,130.16/136,719.03
  6. Step 6: Final answer
    x = 105,274.57

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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.