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Finding the Fourth Proportional to 86,844.80, 130,072.80 and 84,900.80

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Solution

The fourth proportional to 86,844.80, 130,072.80 and 84,900.80 is: 127,161.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,844.80 : 130,072.80 = 84,900.80 : x
  2. Step 2: Convert to fraction form
    86,844.80/130,072.80 = 84,900.80/x
  3. Step 3: Cross multiply
    86,844.80x = 130,072.80 × 84,900.80
  4. Step 4: Simplify right side
    86,844.80x = 11,043,284,778.24
  5. Step 5: Solve for x
    x = 11,043,284,778.24/86,844.80
  6. Step 6: Final answer
    x = 127,161.15

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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.