Home / 78,091.22-117,135.78-18,927.40

Finding the Fourth Proportional to 78,091.22, 117,135.78 and 18,927.40

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Solution

The fourth proportional to 78,091.22, 117,135.78 and 18,927.40 is: 28,390.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.22 : 117,135.78 = 18,927.40 : x
  2. Step 2: Convert to fraction form
    78,091.22/117,135.78 = 18,927.40/x
  3. Step 3: Cross multiply
    78,091.22x = 117,135.78 × 18,927.40
  4. Step 4: Simplify right side
    78,091.22x = 2,217,075,762.37
  5. Step 5: Solve for x
    x = 2,217,075,762.37/78,091.22
  6. Step 6: Final answer
    x = 28,390.85

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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.