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Finding the Fourth Proportional to 201,921.59, 278,653.62 and 111,280.79

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Solution

The fourth proportional to 201,921.59, 278,653.62 and 111,280.79 is: 153,568.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,921.59 : 278,653.62 = 111,280.79 : x
  2. Step 2: Convert to fraction form
    201,921.59/278,653.62 = 111,280.79/x
  3. Step 3: Cross multiply
    201,921.59x = 278,653.62 × 111,280.79
  4. Step 4: Simplify right side
    201,921.59x = 31,008,793,576.69
  5. Step 5: Solve for x
    x = 31,008,793,576.69/201,921.59
  6. Step 6: Final answer
    x = 153,568.49

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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.