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Finding the Fourth Proportional to 199,466.35, 275,238.81 and 121,980.94

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Solution

The fourth proportional to 199,466.35, 275,238.81 and 121,980.94 is: 168,318.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,466.35 : 275,238.81 = 121,980.94 : x
  2. Step 2: Convert to fraction form
    199,466.35/275,238.81 = 121,980.94/x
  3. Step 3: Cross multiply
    199,466.35x = 275,238.81 × 121,980.94
  4. Step 4: Simplify right side
    199,466.35x = 33,573,888,080.18
  5. Step 5: Solve for x
    x = 33,573,888,080.18/199,466.35
  6. Step 6: Final answer
    x = 168,318.56

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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.