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Finding the Fourth Proportional to 200,021.70, 300,032.55 and 121,289.70

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Solution

The fourth proportional to 200,021.70, 300,032.55 and 121,289.70 is: 181,934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,021.70 : 300,032.55 = 121,289.70 : x
  2. Step 2: Convert to fraction form
    200,021.70/300,032.55 = 121,289.70/x
  3. Step 3: Cross multiply
    200,021.70x = 300,032.55 × 121,289.70
  4. Step 4: Simplify right side
    200,021.70x = 36,390,857,979.74
  5. Step 5: Solve for x
    x = 36,390,857,979.74/200,021.70
  6. Step 6: Final answer
    x = 181,934.55

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1.5x scale

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.