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Finding the Fourth Proportional to 214,115.40, 320,865.90 and 157,513.80

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Solution

The fourth proportional to 214,115.40, 320,865.90 and 157,513.80 is: 236,044.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,115.40 : 320,865.90 = 157,513.80 : x
  2. Step 2: Convert to fraction form
    214,115.40/320,865.90 = 157,513.80/x
  3. Step 3: Cross multiply
    214,115.40x = 320,865.90 × 157,513.80
  4. Step 4: Simplify right side
    214,115.40x = 50,540,807,199.42
  5. Step 5: Solve for x
    x = 50,540,807,199.42/214,115.40
  6. Step 6: Final answer
    x = 236,044.71

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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.