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Finding the Fourth Proportional to 72,668.55, 100,283.77 and 39,964.26

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Solution

The fourth proportional to 72,668.55, 100,283.77 and 39,964.26 is: 55,151.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,668.55 : 100,283.77 = 39,964.26 : x
  2. Step 2: Convert to fraction form
    72,668.55/100,283.77 = 39,964.26/x
  3. Step 3: Cross multiply
    72,668.55x = 100,283.77 × 39,964.26
  4. Step 4: Simplify right side
    72,668.55x = 4,007,765,956.82
  5. Step 5: Solve for x
    x = 4,007,765,956.82/72,668.55
  6. Step 6: Final answer
    x = 55,151.31

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1.5x scale

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.