Home / 120,630.45-180,858.19-81,089.49

Finding the Fourth Proportional to 120,630.45, 180,858.19 and 81,089.49

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Solution

The fourth proportional to 120,630.45, 180,858.19 and 81,089.49 is: 121,575.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,630.45 : 180,858.19 = 81,089.49 : x
  2. Step 2: Convert to fraction form
    120,630.45/180,858.19 = 81,089.49/x
  3. Step 3: Cross multiply
    120,630.45x = 180,858.19 × 81,089.49
  4. Step 4: Simplify right side
    120,630.45x = 14,665,698,389.42
  5. Step 5: Solve for x
    x = 14,665,698,389.42/120,630.45
  6. Step 6: Final answer
    x = 121,575.43

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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.