Home / 72,986.85-100,721.80-39,452.85

Finding the Fourth Proportional to 72,986.85, 100,721.80 and 39,452.85

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Solution

The fourth proportional to 72,986.85, 100,721.80 and 39,452.85 is: 54,444.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,986.85 : 100,721.80 = 39,452.85 : x
  2. Step 2: Convert to fraction form
    72,986.85/100,721.80 = 39,452.85/x
  3. Step 3: Cross multiply
    72,986.85x = 100,721.80 × 39,452.85
  4. Step 4: Simplify right side
    72,986.85x = 3,973,762,067.13
  5. Step 5: Solve for x
    x = 3,973,762,067.13/72,986.85
  6. Step 6: Final answer
    x = 54,444.90

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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.