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Finding the Fourth Proportional to 201,979.85, 278,732.11 and 111,337.31

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Solution

The fourth proportional to 201,979.85, 278,732.11 and 111,337.31 is: 153,645.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,979.85 : 278,732.11 = 111,337.31 : x
  2. Step 2: Convert to fraction form
    201,979.85/278,732.11 = 111,337.31/x
  3. Step 3: Cross multiply
    201,979.85x = 278,732.11 × 111,337.31
  4. Step 4: Simplify right side
    201,979.85x = 31,033,283,756.51
  5. Step 5: Solve for x
    x = 31,033,283,756.51/201,979.85
  6. Step 6: Final answer
    x = 153,645.45

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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.