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Finding the Fourth Proportional to 71,667.36, 98,902.08 and 39,837.60

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Solution

The fourth proportional to 71,667.36, 98,902.08 and 39,837.60 is: 54,976.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,667.36 : 98,902.08 = 39,837.60 : x
  2. Step 2: Convert to fraction form
    71,667.36/98,902.08 = 39,837.60/x
  3. Step 3: Cross multiply
    71,667.36x = 98,902.08 × 39,837.60
  4. Step 4: Simplify right side
    71,667.36x = 3,940,021,502.21
  5. Step 5: Solve for x
    x = 3,940,021,502.21/71,667.36
  6. Step 6: Final answer
    x = 54,976.51

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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.