Home / 120,724.40-181,110.90-101,138.60

Finding the Fourth Proportional to 120,724.40, 181,110.90 and 101,138.60

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Solution

The fourth proportional to 120,724.40, 181,110.90 and 101,138.60 is: 151,728.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,724.40 : 181,110.90 = 101,138.60 : x
  2. Step 2: Convert to fraction form
    120,724.40/181,110.90 = 101,138.60/x
  3. Step 3: Cross multiply
    120,724.40x = 181,110.90 × 101,138.60
  4. Step 4: Simplify right side
    120,724.40x = 18,317,302,870.74
  5. Step 5: Solve for x
    x = 18,317,302,870.74/120,724.40
  6. Step 6: Final answer
    x = 151,728.26

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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.