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Finding the Fourth Proportional to 84,912.10, 127,364.10 and 28,746.70

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Solution

The fourth proportional to 84,912.10, 127,364.10 and 28,746.70 is: 43,118.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,912.10 : 127,364.10 = 28,746.70 : x
  2. Step 2: Convert to fraction form
    84,912.10/127,364.10 = 28,746.70/x
  3. Step 3: Cross multiply
    84,912.10x = 127,364.10 × 28,746.70
  4. Step 4: Simplify right side
    84,912.10x = 3,661,297,573.47
  5. Step 5: Solve for x
    x = 3,661,297,573.47/84,912.10
  6. Step 6: Final answer
    x = 43,118.68

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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.