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Finding the Fourth Proportional to 72,668.30, 101,968.90 and 72,668.30

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Solution

The fourth proportional to 72,668.30, 101,968.90 and 72,668.30 is: 101,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,668.30 : 101,968.90 = 72,668.30 : x
  2. Step 2: Convert to fraction form
    72,668.30/101,968.90 = 72,668.30/x
  3. Step 3: Cross multiply
    72,668.30x = 101,968.90 × 72,668.30
  4. Step 4: Simplify right side
    72,668.30x = 7,409,906,615.87
  5. Step 5: Solve for x
    x = 7,409,906,615.87/72,668.30
  6. Step 6: Final answer
    x = 101,968.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.