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Finding the Fourth Proportional to 199,367.78, 275,148.88 and 121,888.89

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Solution

The fourth proportional to 199,367.78, 275,148.88 and 121,888.89 is: 168,219.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,367.78 : 275,148.88 = 121,888.89 : x
  2. Step 2: Convert to fraction form
    199,367.78/275,148.88 = 121,888.89/x
  3. Step 3: Cross multiply
    199,367.78x = 275,148.88 × 121,888.89
  4. Step 4: Simplify right side
    199,367.78x = 33,537,591,263.22
  5. Step 5: Solve for x
    x = 33,537,591,263.22/199,367.78
  6. Step 6: Final answer
    x = 168,219.71

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1.5x scale

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.