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Finding the Fourth Proportional to 103,121.45, 154,919.01 and 72,796.32

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Solution

The fourth proportional to 103,121.45, 154,919.01 and 72,796.32 is: 109,361.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,121.45 : 154,919.01 = 72,796.32 : x
  2. Step 2: Convert to fraction form
    103,121.45/154,919.01 = 72,796.32/x
  3. Step 3: Cross multiply
    103,121.45x = 154,919.01 × 72,796.32
  4. Step 4: Simplify right side
    103,121.45x = 11,277,533,484.81
  5. Step 5: Solve for x
    x = 11,277,533,484.81/103,121.45
  6. Step 6: Final answer
    x = 109,361.66

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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.