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Finding the Fourth Proportional to 143,279.72, 197,698 and 97,906.76

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Solution

The fourth proportional to 143,279.72, 197,698 and 97,906.76 is: 135,092.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,279.72 : 197,698 = 97,906.76 : x
  2. Step 2: Convert to fraction form
    143,279.72/197,698 = 97,906.76/x
  3. Step 3: Cross multiply
    143,279.72x = 197,698 × 97,906.76
  4. Step 4: Simplify right side
    143,279.72x = 19,355,970,638.48
  5. Step 5: Solve for x
    x = 19,355,970,638.48/143,279.72
  6. Step 6: Final answer
    x = 135,092.19

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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.