Home / 78,739.34-118,074.37-28,806.48

Finding the Fourth Proportional to 78,739.34, 118,074.37 and 28,806.48

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Solution

The fourth proportional to 78,739.34, 118,074.37 and 28,806.48 is: 43,197.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.34 : 118,074.37 = 28,806.48 : x
  2. Step 2: Convert to fraction form
    78,739.34/118,074.37 = 28,806.48/x
  3. Step 3: Cross multiply
    78,739.34x = 118,074.37 × 28,806.48
  4. Step 4: Simplify right side
    78,739.34x = 3,401,306,977.92
  5. Step 5: Solve for x
    x = 3,401,306,977.92/78,739.34
  6. Step 6: Final answer
    x = 43,197.05

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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.