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Finding the Fourth Proportional to 84,815.70, 127,223.55 and 43,343.70

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Solution

The fourth proportional to 84,815.70, 127,223.55 and 43,343.70 is: 65,015.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,815.70 : 127,223.55 = 43,343.70 : x
  2. Step 2: Convert to fraction form
    84,815.70/127,223.55 = 43,343.70/x
  3. Step 3: Cross multiply
    84,815.70x = 127,223.55 × 43,343.70
  4. Step 4: Simplify right side
    84,815.70x = 5,514,339,384.14
  5. Step 5: Solve for x
    x = 5,514,339,384.14/84,815.70
  6. Step 6: Final answer
    x = 65,015.55

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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.