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Finding the Fourth Proportional to 213,612.80, 320,073.60 and 134,585.60

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Solution

The fourth proportional to 213,612.80, 320,073.60 and 134,585.60 is: 201,660.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,612.80 : 320,073.60 = 134,585.60 : x
  2. Step 2: Convert to fraction form
    213,612.80/320,073.60 = 134,585.60/x
  3. Step 3: Cross multiply
    213,612.80x = 320,073.60 × 134,585.60
  4. Step 4: Simplify right side
    213,612.80x = 43,077,297,500.16
  5. Step 5: Solve for x
    x = 43,077,297,500.16/213,612.80
  6. Step 6: Final answer
    x = 201,660.66

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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.