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Finding the Fourth Proportional to 214,042.80, 320,718.60 and 135,015.60

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Solution

The fourth proportional to 214,042.80, 320,718.60 and 135,015.60 is: 202,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,042.80 : 320,718.60 = 135,015.60 : x
  2. Step 2: Convert to fraction form
    214,042.80/320,718.60 = 135,015.60/x
  3. Step 3: Cross multiply
    214,042.80x = 320,718.60 × 135,015.60
  4. Step 4: Simplify right side
    214,042.80x = 43,302,014,210.16
  5. Step 5: Solve for x
    x = 43,302,014,210.16/214,042.80
  6. Step 6: Final answer
    x = 202,305.40

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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.