Home / 81,024.40-121,536.60-71,401.60

Finding the Fourth Proportional to 81,024.40, 121,536.60 and 71,401.60

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Solution

The fourth proportional to 81,024.40, 121,536.60 and 71,401.60 is: 107,102.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,024.40 : 121,536.60 = 71,401.60 : x
  2. Step 2: Convert to fraction form
    81,024.40/121,536.60 = 71,401.60/x
  3. Step 3: Cross multiply
    81,024.40x = 121,536.60 × 71,401.60
  4. Step 4: Simplify right side
    81,024.40x = 8,677,907,698.56
  5. Step 5: Solve for x
    x = 8,677,907,698.56/81,024.40
  6. Step 6: Final answer
    x = 107,102.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.