Home / 120,376.80-180,565.20-90,633.60

Finding the Fourth Proportional to 120,376.80, 180,565.20 and 90,633.60

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Solution

The fourth proportional to 120,376.80, 180,565.20 and 90,633.60 is: 135,950.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,376.80 : 180,565.20 = 90,633.60 : x
  2. Step 2: Convert to fraction form
    120,376.80/180,565.20 = 90,633.60/x
  3. Step 3: Cross multiply
    120,376.80x = 180,565.20 × 90,633.60
  4. Step 4: Simplify right side
    120,376.80x = 16,365,274,110.72
  5. Step 5: Solve for x
    x = 16,365,274,110.72/120,376.80
  6. Step 6: Final answer
    x = 135,950.40

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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.