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Finding the Fourth Proportional to 146,315, 201,914.70 and 79,247

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Solution

The fourth proportional to 146,315, 201,914.70 and 79,247 is: 109,360.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,315 : 201,914.70 = 79,247 : x
  2. Step 2: Convert to fraction form
    146,315/201,914.70 = 79,247/x
  3. Step 3: Cross multiply
    146,315x = 201,914.70 × 79,247
  4. Step 4: Simplify right side
    146,315x = 16,001,134,230.90
  5. Step 5: Solve for x
    x = 16,001,134,230.90/146,315
  6. Step 6: Final answer
    x = 109,360.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.