Home / 71,120.90-98,145.43-39,289.50

Finding the Fourth Proportional to 71,120.90, 98,145.43 and 39,289.50

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Solution

The fourth proportional to 71,120.90, 98,145.43 and 39,289.50 is: 54,218.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,120.90 : 98,145.43 = 39,289.50 : x
  2. Step 2: Convert to fraction form
    71,120.90/98,145.43 = 39,289.50/x
  3. Step 3: Cross multiply
    71,120.90x = 98,145.43 × 39,289.50
  4. Step 4: Simplify right side
    71,120.90x = 3,856,084,871.99
  5. Step 5: Solve for x
    x = 3,856,084,871.99/71,120.90
  6. Step 6: Final answer
    x = 54,218.73

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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.