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Finding the Fourth Proportional to 71,138.75, 98,181.30 and 40,923.51

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Solution

The fourth proportional to 71,138.75, 98,181.30 and 40,923.51 is: 56,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,138.75 : 98,181.30 = 40,923.51 : x
  2. Step 2: Convert to fraction form
    71,138.75/98,181.30 = 40,923.51/x
  3. Step 3: Cross multiply
    71,138.75x = 98,181.30 × 40,923.51
  4. Step 4: Simplify right side
    71,138.75x = 4,017,923,412.36
  5. Step 5: Solve for x
    x = 4,017,923,412.36/71,138.75
  6. Step 6: Final answer
    x = 56,480.10

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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.