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Finding the Fourth Proportional to 103,866.76, 155,688.96 and 74,194.63

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Solution

The fourth proportional to 103,866.76, 155,688.96 and 74,194.63 is: 111,212.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,866.76 : 155,688.96 = 74,194.63 : x
  2. Step 2: Convert to fraction form
    103,866.76/155,688.96 = 74,194.63/x
  3. Step 3: Cross multiply
    103,866.76x = 155,688.96 × 74,194.63
  4. Step 4: Simplify right side
    103,866.76x = 11,551,284,782.28
  5. Step 5: Solve for x
    x = 11,551,284,782.28/103,866.76
  6. Step 6: Final answer
    x = 111,212.53

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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.