Home / 71,121.12-98,145.72-39,289.20

Finding the Fourth Proportional to 71,121.12, 98,145.72 and 39,289.20

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Solution

The fourth proportional to 71,121.12, 98,145.72 and 39,289.20 is: 54,218.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,121.12 : 98,145.72 = 39,289.20 : x
  2. Step 2: Convert to fraction form
    71,121.12/98,145.72 = 39,289.20/x
  3. Step 3: Cross multiply
    71,121.12x = 98,145.72 × 39,289.20
  4. Step 4: Simplify right side
    71,121.12x = 3,856,066,822.22
  5. Step 5: Solve for x
    x = 3,856,066,822.22/71,121.12
  6. Step 6: Final answer
    x = 54,218.31

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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.