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Finding the Fourth Proportional to 71,679.69, 98,894.88 and 39,842.46

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Solution

The fourth proportional to 71,679.69, 98,894.88 and 39,842.46 is: 54,969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,679.69 : 98,894.88 = 39,842.46 : x
  2. Step 2: Convert to fraction form
    71,679.69/98,894.88 = 39,842.46/x
  3. Step 3: Cross multiply
    71,679.69x = 98,894.88 × 39,842.46
  4. Step 4: Simplify right side
    71,679.69x = 3,940,215,300.60
  5. Step 5: Solve for x
    x = 3,940,215,300.60/71,679.69
  6. Step 6: Final answer
    x = 54,969.76

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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.