Home / 80,698.10-121,063.48-28,111.68

Finding the Fourth Proportional to 80,698.10, 121,063.48 and 28,111.68

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Solution

The fourth proportional to 80,698.10, 121,063.48 and 28,111.68 is: 42,173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,698.10 : 121,063.48 = 28,111.68 : x
  2. Step 2: Convert to fraction form
    80,698.10/121,063.48 = 28,111.68/x
  3. Step 3: Cross multiply
    80,698.10x = 121,063.48 × 28,111.68
  4. Step 4: Simplify right side
    80,698.10x = 3,403,297,739.17
  5. Step 5: Solve for x
    x = 3,403,297,739.17/80,698.10
  6. Step 6: Final answer
    x = 42,173.21

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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.