Home / 71,811.71-99,104.09-39,979.91

Finding the Fourth Proportional to 71,811.71, 99,104.09 and 39,979.91

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Solution

The fourth proportional to 71,811.71, 99,104.09 and 39,979.91 is: 55,174.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,811.71 : 99,104.09 = 39,979.91 : x
  2. Step 2: Convert to fraction form
    71,811.71/99,104.09 = 39,979.91/x
  3. Step 3: Cross multiply
    71,811.71x = 99,104.09 × 39,979.91
  4. Step 4: Simplify right side
    71,811.71x = 3,962,172,398.93
  5. Step 5: Solve for x
    x = 3,962,172,398.93/71,811.71
  6. Step 6: Final answer
    x = 55,174.46

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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.