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Finding the Fourth Proportional to 154,074.60, 212,610.83 and 85,161.16

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Solution

The fourth proportional to 154,074.60, 212,610.83 and 85,161.16 is: 117,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,074.60 : 212,610.83 = 85,161.16 : x
  2. Step 2: Convert to fraction form
    154,074.60/212,610.83 = 85,161.16/x
  3. Step 3: Cross multiply
    154,074.60x = 212,610.83 × 85,161.16
  4. Step 4: Simplify right side
    154,074.60x = 18,106,183,954.03
  5. Step 5: Solve for x
    x = 18,106,183,954.03/154,074.60
  6. Step 6: Final answer
    x = 117,515.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.