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Finding the Fourth Proportional to 71,499.63, 98,669.60 and 39,668.55

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Solution

The fourth proportional to 71,499.63, 98,669.60 and 39,668.55 is: 54,742.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,499.63 : 98,669.60 = 39,668.55 : x
  2. Step 2: Convert to fraction form
    71,499.63/98,669.60 = 39,668.55/x
  3. Step 3: Cross multiply
    71,499.63x = 98,669.60 × 39,668.55
  4. Step 4: Simplify right side
    71,499.63x = 3,914,079,762.74
  5. Step 5: Solve for x
    x = 3,914,079,762.74/71,499.63
  6. Step 6: Final answer
    x = 54,742.66

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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.