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Finding the Fourth Proportional to 155,338, 214,357.64 and 91,661.20

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Solution

The fourth proportional to 155,338, 214,357.64 and 91,661.20 is: 126,487.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,338 : 214,357.64 = 91,661.20 : x
  2. Step 2: Convert to fraction form
    155,338/214,357.64 = 91,661.20/x
  3. Step 3: Cross multiply
    155,338x = 214,357.64 × 91,661.20
  4. Step 4: Simplify right side
    155,338x = 19,648,278,511.57
  5. Step 5: Solve for x
    x = 19,648,278,511.57/155,338
  6. Step 6: Final answer
    x = 126,487.26

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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.