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Finding the Fourth Proportional to 103,693.80, 155,496.69 and 43,749.15

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Solution

The fourth proportional to 103,693.80, 155,496.69 and 43,749.15 is: 65,605.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,693.80 : 155,496.69 = 43,749.15 : x
  2. Step 2: Convert to fraction form
    103,693.80/155,496.69 = 43,749.15/x
  3. Step 3: Cross multiply
    103,693.80x = 155,496.69 × 43,749.15
  4. Step 4: Simplify right side
    103,693.80x = 6,802,848,015.31
  5. Step 5: Solve for x
    x = 6,802,848,015.31/103,693.80
  6. Step 6: Final answer
    x = 65,605.16

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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.