Home / 78,106.66-117,135.74-28,180.25

Finding the Fourth Proportional to 78,106.66, 117,135.74 and 28,180.25

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Solution

The fourth proportional to 78,106.66, 117,135.74 and 28,180.25 is: 42,261.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,106.66 : 117,135.74 = 28,180.25 : x
  2. Step 2: Convert to fraction form
    78,106.66/117,135.74 = 28,180.25/x
  3. Step 3: Cross multiply
    78,106.66x = 117,135.74 × 28,180.25
  4. Step 4: Simplify right side
    78,106.66x = 3,300,914,437.14
  5. Step 5: Solve for x
    x = 3,300,914,437.14/78,106.66
  6. Step 6: Final answer
    x = 42,261.63

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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.