Home / 78,106.83-117,136.01-28,180.44

Finding the Fourth Proportional to 78,106.83, 117,136.01 and 28,180.44

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Solution

The fourth proportional to 78,106.83, 117,136.01 and 28,180.44 is: 42,261.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,106.83 : 117,136.01 = 28,180.44 : x
  2. Step 2: Convert to fraction form
    78,106.83/117,136.01 = 28,180.44/x
  3. Step 3: Cross multiply
    78,106.83x = 117,136.01 × 28,180.44
  4. Step 4: Simplify right side
    78,106.83x = 3,300,944,160.74
  5. Step 5: Solve for x
    x = 3,300,944,160.74/78,106.83
  6. Step 6: Final answer
    x = 42,261.91

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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.