Home / 71,971.91-99,321.23-40,140.13

Finding the Fourth Proportional to 71,971.91, 99,321.23 and 40,140.13

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Solution

The fourth proportional to 71,971.91, 99,321.23 and 40,140.13 is: 55,393.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,971.91 : 99,321.23 = 40,140.13 : x
  2. Step 2: Convert to fraction form
    71,971.91/99,321.23 = 40,140.13/x
  3. Step 3: Cross multiply
    71,971.91x = 99,321.23 × 40,140.13
  4. Step 4: Simplify right side
    71,971.91x = 3,986,766,386.65
  5. Step 5: Solve for x
    x = 3,986,766,386.65/71,971.91
  6. Step 6: Final answer
    x = 55,393.37

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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.