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Finding the Fourth Proportional to 201,399.50, 302,143.26 and 76,740.50

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Solution

The fourth proportional to 201,399.50, 302,143.26 and 76,740.50 is: 115,127.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,399.50 : 302,143.26 = 76,740.50 : x
  2. Step 2: Convert to fraction form
    201,399.50/302,143.26 = 76,740.50/x
  3. Step 3: Cross multiply
    201,399.50x = 302,143.26 × 76,740.50
  4. Step 4: Simplify right side
    201,399.50x = 23,186,624,844.03
  5. Step 5: Solve for x
    x = 23,186,624,844.03/201,399.50
  6. Step 6: Final answer
    x = 115,127.52

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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.