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Finding the Fourth Proportional to 71,671.92, 98,900.34 and 39,838.92

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Solution

The fourth proportional to 71,671.92, 98,900.34 and 39,838.92 is: 54,973.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.92 : 98,900.34 = 39,838.92 : x
  2. Step 2: Convert to fraction form
    71,671.92/98,900.34 = 39,838.92/x
  3. Step 3: Cross multiply
    71,671.92x = 98,900.34 × 39,838.92
  4. Step 4: Simplify right side
    71,671.92x = 3,940,082,733.23
  5. Step 5: Solve for x
    x = 3,940,082,733.23/71,671.92
  6. Step 6: Final answer
    x = 54,973.87

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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.