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Finding the Fourth Proportional to 77,980.57, 117,022.76 and 42,450.85

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Solution

The fourth proportional to 77,980.57, 117,022.76 and 42,450.85 is: 63,704.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980.57 : 117,022.76 = 42,450.85 : x
  2. Step 2: Convert to fraction form
    77,980.57/117,022.76 = 42,450.85/x
  3. Step 3: Cross multiply
    77,980.57x = 117,022.76 × 42,450.85
  4. Step 4: Simplify right side
    77,980.57x = 4,967,715,724.56
  5. Step 5: Solve for x
    x = 4,967,715,724.56/77,980.57
  6. Step 6: Final answer
    x = 63,704.53

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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.