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Finding the Fourth Proportional to 103,865.76, 155,687.46 and 74,193.63

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Solution

The fourth proportional to 103,865.76, 155,687.46 and 74,193.63 is: 111,211.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,865.76 : 155,687.46 = 74,193.63 : x
  2. Step 2: Convert to fraction form
    103,865.76/155,687.46 = 74,193.63/x
  3. Step 3: Cross multiply
    103,865.76x = 155,687.46 × 74,193.63
  4. Step 4: Simplify right side
    103,865.76x = 11,551,017,802.88
  5. Step 5: Solve for x
    x = 11,551,017,802.88/103,865.76
  6. Step 6: Final answer
    x = 111,211.03

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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.