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Finding the Fourth Proportional to 72,969.54, 100,698.04 and 39,435.54

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Solution

The fourth proportional to 72,969.54, 100,698.04 and 39,435.54 is: 54,421.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,969.54 : 100,698.04 = 39,435.54 : x
  2. Step 2: Convert to fraction form
    72,969.54/100,698.04 = 39,435.54/x
  3. Step 3: Cross multiply
    72,969.54x = 100,698.04 × 39,435.54
  4. Step 4: Simplify right side
    72,969.54x = 3,971,081,584.34
  5. Step 5: Solve for x
    x = 3,971,081,584.34/72,969.54
  6. Step 6: Final answer
    x = 54,421.09

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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.