Home / 120,093.12-180,134.64-30,135.60

Finding the Fourth Proportional to 120,093.12, 180,134.64 and 30,135.60

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Solution

The fourth proportional to 120,093.12, 180,134.64 and 30,135.60 is: 45,202.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,093.12 : 180,134.64 = 30,135.60 : x
  2. Step 2: Convert to fraction form
    120,093.12/180,134.64 = 30,135.60/x
  3. Step 3: Cross multiply
    120,093.12x = 180,134.64 × 30,135.60
  4. Step 4: Simplify right side
    120,093.12x = 5,428,465,457.18
  5. Step 5: Solve for x
    x = 5,428,465,457.18/120,093.12
  6. Step 6: Final answer
    x = 45,202.14

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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.