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Finding the Fourth Proportional to 84,394.81, 126,544.83 and 28,205.32

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Solution

The fourth proportional to 84,394.81, 126,544.83 and 28,205.32 is: 42,292.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,394.81 : 126,544.83 = 28,205.32 : x
  2. Step 2: Convert to fraction form
    84,394.81/126,544.83 = 28,205.32/x
  3. Step 3: Cross multiply
    84,394.81x = 126,544.83 × 28,205.32
  4. Step 4: Simplify right side
    84,394.81x = 3,569,237,424.50
  5. Step 5: Solve for x
    x = 3,569,237,424.50/84,394.81
  6. Step 6: Final answer
    x = 42,292.14

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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.