Home / 120,455.12-180,612.64-45,581.06

Finding the Fourth Proportional to 120,455.12, 180,612.64 and 45,581.06

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Solution

The fourth proportional to 120,455.12, 180,612.64 and 45,581.06 is: 68,345.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,455.12 : 180,612.64 = 45,581.06 : x
  2. Step 2: Convert to fraction form
    120,455.12/180,612.64 = 45,581.06/x
  3. Step 3: Cross multiply
    120,455.12x = 180,612.64 × 45,581.06
  4. Step 4: Simplify right side
    120,455.12x = 8,232,515,580.60
  5. Step 5: Solve for x
    x = 8,232,515,580.60/120,455.12
  6. Step 6: Final answer
    x = 68,345.09

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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.