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Finding the Fourth Proportional to 71,800.12, 99,109.74 and 51,668.92

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Solution

The fourth proportional to 71,800.12, 99,109.74 and 51,668.92 is: 71,321.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,800.12 : 99,109.74 = 51,668.92 : x
  2. Step 2: Convert to fraction form
    71,800.12/99,109.74 = 51,668.92/x
  3. Step 3: Cross multiply
    71,800.12x = 99,109.74 × 51,668.92
  4. Step 4: Simplify right side
    71,800.12x = 5,120,893,227.28
  5. Step 5: Solve for x
    x = 5,120,893,227.28/71,800.12
  6. Step 6: Final answer
    x = 71,321.51

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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.