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Finding the Fourth Proportional to 84,528, 126,771.45 and 28,353.54

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Solution

The fourth proportional to 84,528, 126,771.45 and 28,353.54 is: 42,523.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,528 : 126,771.45 = 28,353.54 : x
  2. Step 2: Convert to fraction form
    84,528/126,771.45 = 28,353.54/x
  3. Step 3: Cross multiply
    84,528x = 126,771.45 × 28,353.54
  4. Step 4: Simplify right side
    84,528x = 3,594,419,378.43
  5. Step 5: Solve for x
    x = 3,594,419,378.43/84,528
  6. Step 6: Final answer
    x = 42,523.42

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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.