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Finding the Fourth Proportional to 388,642.68, 583,133.44 and 136,104.33

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Solution

The fourth proportional to 388,642.68, 583,133.44 and 136,104.33 is: 204,215.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,642.68 : 583,133.44 = 136,104.33 : x
  2. Step 2: Convert to fraction form
    388,642.68/583,133.44 = 136,104.33/x
  3. Step 3: Cross multiply
    388,642.68x = 583,133.44 × 136,104.33
  4. Step 4: Simplify right side
    388,642.68x = 79,366,986,151.80
  5. Step 5: Solve for x
    x = 79,366,986,151.80/388,642.68
  6. Step 6: Final answer
    x = 204,215.83

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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.