Home / 81,410.23-122,129.20-28,087.75

Finding the Fourth Proportional to 81,410.23, 122,129.20 and 28,087.75

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Solution

The fourth proportional to 81,410.23, 122,129.20 and 28,087.75 is: 42,136.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,410.23 : 122,129.20 = 28,087.75 : x
  2. Step 2: Convert to fraction form
    81,410.23/122,129.20 = 28,087.75/x
  3. Step 3: Cross multiply
    81,410.23x = 122,129.20 × 28,087.75
  4. Step 4: Simplify right side
    81,410.23x = 3,430,334,437.30
  5. Step 5: Solve for x
    x = 3,430,334,437.30/81,410.23
  6. Step 6: Final answer
    x = 42,136.41

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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.