Home / 80,630.19-120,929.49-76,629.51

Finding the Fourth Proportional to 80,630.19, 120,929.49 and 76,629.51

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Solution

The fourth proportional to 80,630.19, 120,929.49 and 76,629.51 is: 114,929.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,630.19 : 120,929.49 = 76,629.51 : x
  2. Step 2: Convert to fraction form
    80,630.19/120,929.49 = 76,629.51/x
  3. Step 3: Cross multiply
    80,630.19x = 120,929.49 × 76,629.51
  4. Step 4: Simplify right side
    80,630.19x = 9,266,767,563.25
  5. Step 5: Solve for x
    x = 9,266,767,563.25/80,630.19
  6. Step 6: Final answer
    x = 114,929.25

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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.