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Finding the Fourth Proportional to 201,429.79, 277,959.55 and 115,389.11

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Solution

The fourth proportional to 201,429.79, 277,959.55 and 115,389.11 is: 159,229.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,429.79 : 277,959.55 = 115,389.11 : x
  2. Step 2: Convert to fraction form
    201,429.79/277,959.55 = 115,389.11/x
  3. Step 3: Cross multiply
    201,429.79x = 277,959.55 × 115,389.11
  4. Step 4: Simplify right side
    201,429.79x = 32,073,504,149.76
  5. Step 5: Solve for x
    x = 32,073,504,149.76/201,429.79
  6. Step 6: Final answer
    x = 159,229.20

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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.