Home / 79,977.88-110,145-78,233.92

Finding the Fourth Proportional to 79,977.88, 110,145 and 78,233.92

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Solution

The fourth proportional to 79,977.88, 110,145 and 78,233.92 is: 107,743.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,977.88 : 110,145 = 78,233.92 : x
  2. Step 2: Convert to fraction form
    79,977.88/110,145 = 78,233.92/x
  3. Step 3: Cross multiply
    79,977.88x = 110,145 × 78,233.92
  4. Step 4: Simplify right side
    79,977.88x = 8,617,075,118.40
  5. Step 5: Solve for x
    x = 8,617,075,118.40/79,977.88
  6. Step 6: Final answer
    x = 107,743.23

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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.