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Finding the Fourth Proportional to 71,983.63, 99,336.75 and 39,718.54

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Solution

The fourth proportional to 71,983.63, 99,336.75 and 39,718.54 is: 54,811.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,983.63 : 99,336.75 = 39,718.54 : x
  2. Step 2: Convert to fraction form
    71,983.63/99,336.75 = 39,718.54/x
  3. Step 3: Cross multiply
    71,983.63x = 99,336.75 × 39,718.54
  4. Step 4: Simplify right side
    71,983.63x = 3,945,510,678.35
  5. Step 5: Solve for x
    x = 3,945,510,678.35/71,983.63
  6. Step 6: Final answer
    x = 54,811.22

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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.