Home / 71,811.16-99,097.60-39,979.36

Finding the Fourth Proportional to 71,811.16, 99,097.60 and 39,979.36

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Solution

The fourth proportional to 71,811.16, 99,097.60 and 39,979.36 is: 55,170.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,811.16 : 99,097.60 = 39,979.36 : x
  2. Step 2: Convert to fraction form
    71,811.16/99,097.60 = 39,979.36/x
  3. Step 3: Cross multiply
    71,811.16x = 99,097.60 × 39,979.36
  4. Step 4: Simplify right side
    71,811.16x = 3,961,858,625.54
  5. Step 5: Solve for x
    x = 3,961,858,625.54/71,811.16
  6. Step 6: Final answer
    x = 55,170.51

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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.