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Finding the Fourth Proportional to 108,759.48, 163,119.78 and 69,199.08

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Solution

The fourth proportional to 108,759.48, 163,119.78 and 69,199.08 is: 103,786.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,759.48 : 163,119.78 = 69,199.08 : x
  2. Step 2: Convert to fraction form
    108,759.48/163,119.78 = 69,199.08/x
  3. Step 3: Cross multiply
    108,759.48x = 163,119.78 × 69,199.08
  4. Step 4: Simplify right side
    108,759.48x = 11,287,738,705.80
  5. Step 5: Solve for x
    x = 11,287,738,705.80/108,759.48
  6. Step 6: Final answer
    x = 103,786.25

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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.