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Finding the Fourth Proportional to 77,081.60, 108,121.60 and 77,081.60

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Solution

The fourth proportional to 77,081.60, 108,121.60 and 77,081.60 is: 108,121.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,081.60 : 108,121.60 = 77,081.60 : x
  2. Step 2: Convert to fraction form
    77,081.60/108,121.60 = 77,081.60/x
  3. Step 3: Cross multiply
    77,081.60x = 108,121.60 × 77,081.60
  4. Step 4: Simplify right side
    77,081.60x = 8,334,185,922.56
  5. Step 5: Solve for x
    x = 8,334,185,922.56/77,081.60
  6. Step 6: Final answer
    x = 108,121.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.