Home / 78,249.80-117,345.21-28,317.56

Finding the Fourth Proportional to 78,249.80, 117,345.21 and 28,317.56

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Solution

The fourth proportional to 78,249.80, 117,345.21 and 28,317.56 is: 42,465.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,249.80 : 117,345.21 = 28,317.56 : x
  2. Step 2: Convert to fraction form
    78,249.80/117,345.21 = 28,317.56/x
  3. Step 3: Cross multiply
    78,249.80x = 117,345.21 × 28,317.56
  4. Step 4: Simplify right side
    78,249.80x = 3,322,930,024.89
  5. Step 5: Solve for x
    x = 3,322,930,024.89/78,249.80
  6. Step 6: Final answer
    x = 42,465.67

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1.5x scale

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.