Home / 120,418.60-180,629.72-45,574

Finding the Fourth Proportional to 120,418.60, 180,629.72 and 45,574

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Solution

The fourth proportional to 120,418.60, 180,629.72 and 45,574 is: 68,361.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,418.60 : 180,629.72 = 45,574 : x
  2. Step 2: Convert to fraction form
    120,418.60/180,629.72 = 45,574/x
  3. Step 3: Cross multiply
    120,418.60x = 180,629.72 × 45,574
  4. Step 4: Simplify right side
    120,418.60x = 8,232,018,859.28
  5. Step 5: Solve for x
    x = 8,232,018,859.28/120,418.60
  6. Step 6: Final answer
    x = 68,361.69

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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.