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Finding the Fourth Proportional to 86,126.49, 118,846.49 and 79,778.70

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Solution

The fourth proportional to 86,126.49, 118,846.49 and 79,778.70 is: 110,087.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,126.49 : 118,846.49 = 79,778.70 : x
  2. Step 2: Convert to fraction form
    86,126.49/118,846.49 = 79,778.70/x
  3. Step 3: Cross multiply
    86,126.49x = 118,846.49 × 79,778.70
  4. Step 4: Simplify right side
    86,126.49x = 9,481,418,072.87
  5. Step 5: Solve for x
    x = 9,481,418,072.87/86,126.49
  6. Step 6: Final answer
    x = 110,087.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.