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Finding the Fourth Proportional to 43,356.60, 65,450.70 and 42,919.20

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Solution

The fourth proportional to 43,356.60, 65,450.70 and 42,919.20 is: 64,790.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,356.60 : 65,450.70 = 42,919.20 : x
  2. Step 2: Convert to fraction form
    43,356.60/65,450.70 = 42,919.20/x
  3. Step 3: Cross multiply
    43,356.60x = 65,450.70 × 42,919.20
  4. Step 4: Simplify right side
    43,356.60x = 2,809,091,683.44
  5. Step 5: Solve for x
    x = 2,809,091,683.44/43,356.60
  6. Step 6: Final answer
    x = 64,790.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.