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Finding the Fourth Proportional to 84,668.27, 126,913.49 and 28,488.87

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Solution

The fourth proportional to 84,668.27, 126,913.49 and 28,488.87 is: 42,703.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,668.27 : 126,913.49 = 28,488.87 : x
  2. Step 2: Convert to fraction form
    84,668.27/126,913.49 = 28,488.87/x
  3. Step 3: Cross multiply
    84,668.27x = 126,913.49 × 28,488.87
  4. Step 4: Simplify right side
    84,668.27x = 3,615,621,917.86
  5. Step 5: Solve for x
    x = 3,615,621,917.86/84,668.27
  6. Step 6: Final answer
    x = 42,703.39

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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.