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Finding the Fourth Proportional to 103,674.69, 155,470.18 and 40,485.78

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Solution

The fourth proportional to 103,674.69, 155,470.18 and 40,485.78 is: 60,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,674.69 : 155,470.18 = 40,485.78 : x
  2. Step 2: Convert to fraction form
    103,674.69/155,470.18 = 40,485.78/x
  3. Step 3: Cross multiply
    103,674.69x = 155,470.18 × 40,485.78
  4. Step 4: Simplify right side
    103,674.69x = 6,294,331,504.04
  5. Step 5: Solve for x
    x = 6,294,331,504.04/103,674.69
  6. Step 6: Final answer
    x = 60,712.33

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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.