Home / 71,811.88-99,098.10-39,979.16

Finding the Fourth Proportional to 71,811.88, 99,098.10 and 39,979.16

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Solution

The fourth proportional to 71,811.88, 99,098.10 and 39,979.16 is: 55,169.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,811.88 : 99,098.10 = 39,979.16 : x
  2. Step 2: Convert to fraction form
    71,811.88/99,098.10 = 39,979.16/x
  3. Step 3: Cross multiply
    71,811.88x = 99,098.10 × 39,979.16
  4. Step 4: Simplify right side
    71,811.88x = 3,961,858,795.60
  5. Step 5: Solve for x
    x = 3,961,858,795.60/71,811.88
  6. Step 6: Final answer
    x = 55,169.96

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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.