Home / 71,811.21-99,103.40-39,979.41

Finding the Fourth Proportional to 71,811.21, 99,103.40 and 39,979.41

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Solution

The fourth proportional to 71,811.21, 99,103.40 and 39,979.41 is: 55,173.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,811.21 : 99,103.40 = 39,979.41 : x
  2. Step 2: Convert to fraction form
    71,811.21/99,103.40 = 39,979.41/x
  3. Step 3: Cross multiply
    71,811.21x = 99,103.40 × 39,979.41
  4. Step 4: Simplify right side
    71,811.21x = 3,962,095,261.10
  5. Step 5: Solve for x
    x = 3,962,095,261.10/71,811.21
  6. Step 6: Final answer
    x = 55,173.77

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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.