Home / 79,121.21-118,651.05-28,506.74

Finding the Fourth Proportional to 79,121.21, 118,651.05 and 28,506.74

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Solution

The fourth proportional to 79,121.21, 118,651.05 and 28,506.74 is: 42,749.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.21 : 118,651.05 = 28,506.74 : x
  2. Step 2: Convert to fraction form
    79,121.21/118,651.05 = 28,506.74/x
  3. Step 3: Cross multiply
    79,121.21x = 118,651.05 × 28,506.74
  4. Step 4: Simplify right side
    79,121.21x = 3,382,354,039.82
  5. Step 5: Solve for x
    x = 3,382,354,039.82/79,121.21
  6. Step 6: Final answer
    x = 42,749.02

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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.