Home / 120,145.07-180,236.29-40,158.28

Finding the Fourth Proportional to 120,145.07, 180,236.29 and 40,158.28

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Solution

The fourth proportional to 120,145.07, 180,236.29 and 40,158.28 is: 60,243.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,145.07 : 180,236.29 = 40,158.28 : x
  2. Step 2: Convert to fraction form
    120,145.07/180,236.29 = 40,158.28/x
  3. Step 3: Cross multiply
    120,145.07x = 180,236.29 × 40,158.28
  4. Step 4: Simplify right side
    120,145.07x = 7,237,978,748.60
  5. Step 5: Solve for x
    x = 7,237,978,748.60/120,145.07
  6. Step 6: Final answer
    x = 60,243.66

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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.