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Finding the Fourth Proportional to 190,679, 286,093.82 and 72,381.74

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Solution

The fourth proportional to 190,679, 286,093.82 and 72,381.74 is: 108,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,679 : 286,093.82 = 72,381.74 : x
  2. Step 2: Convert to fraction form
    190,679/286,093.82 = 72,381.74/x
  3. Step 3: Cross multiply
    190,679x = 286,093.82 × 72,381.74
  4. Step 4: Simplify right side
    190,679x = 20,707,968,494.85
  5. Step 5: Solve for x
    x = 20,707,968,494.85/190,679
  6. Step 6: Final answer
    x = 108,601.20

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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.