Home / 72,986.36-100,721.12-39,452.36

Finding the Fourth Proportional to 72,986.36, 100,721.12 and 39,452.36

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Solution

The fourth proportional to 72,986.36, 100,721.12 and 39,452.36 is: 54,444.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,986.36 : 100,721.12 = 39,452.36 : x
  2. Step 2: Convert to fraction form
    72,986.36/100,721.12 = 39,452.36/x
  3. Step 3: Cross multiply
    72,986.36x = 100,721.12 × 39,452.36
  4. Step 4: Simplify right side
    72,986.36x = 3,973,685,184.98
  5. Step 5: Solve for x
    x = 3,973,685,184.98/72,986.36
  6. Step 6: Final answer
    x = 54,444.22

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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.