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Finding the Fourth Proportional to 103,940.60, 155,969.37 and 56,559.15

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Solution

The fourth proportional to 103,940.60, 155,969.37 and 56,559.15 is: 84,870.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,940.60 : 155,969.37 = 56,559.15 : x
  2. Step 2: Convert to fraction form
    103,940.60/155,969.37 = 56,559.15/x
  3. Step 3: Cross multiply
    103,940.60x = 155,969.37 × 56,559.15
  4. Step 4: Simplify right side
    103,940.60x = 8,821,494,993.24
  5. Step 5: Solve for x
    x = 8,821,494,993.24/103,940.60
  6. Step 6: Final answer
    x = 84,870.55

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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.