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Finding the Fourth Proportional to 388,764.62, 583,128.87 and 136,101.79

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Solution

The fourth proportional to 388,764.62, 583,128.87 and 136,101.79 is: 204,146.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,764.62 : 583,128.87 = 136,101.79 : x
  2. Step 2: Convert to fraction form
    388,764.62/583,128.87 = 136,101.79/x
  3. Step 3: Cross multiply
    388,764.62x = 583,128.87 × 136,101.79
  4. Step 4: Simplify right side
    388,764.62x = 79,364,884,770.56
  5. Step 5: Solve for x
    x = 79,364,884,770.56/388,764.62
  6. Step 6: Final answer
    x = 204,146.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.