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Finding the Fourth Proportional to 146,211, 201,771.18 and 79,143

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Solution

The fourth proportional to 146,211, 201,771.18 and 79,143 is: 109,217.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,211 : 201,771.18 = 79,143 : x
  2. Step 2: Convert to fraction form
    146,211/201,771.18 = 79,143/x
  3. Step 3: Cross multiply
    146,211x = 201,771.18 × 79,143
  4. Step 4: Simplify right side
    146,211x = 15,968,776,498.74
  5. Step 5: Solve for x
    x = 15,968,776,498.74/146,211
  6. Step 6: Final answer
    x = 109,217.34

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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.