Home / 78,075.70-117,113.24-18,911.27

Finding the Fourth Proportional to 78,075.70, 117,113.24 and 18,911.27

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Solution

The fourth proportional to 78,075.70, 117,113.24 and 18,911.27 is: 28,366.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,075.70 : 117,113.24 = 18,911.27 : x
  2. Step 2: Convert to fraction form
    78,075.70/117,113.24 = 18,911.27/x
  3. Step 3: Cross multiply
    78,075.70x = 117,113.24 × 18,911.27
  4. Step 4: Simplify right side
    78,075.70x = 2,214,760,442.28
  5. Step 5: Solve for x
    x = 2,214,760,442.28/78,075.70
  6. Step 6: Final answer
    x = 28,366.84

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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.