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Finding the Fourth Proportional to 120,169.72, 180,256.02 and 72,795.16

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Solution

The fourth proportional to 120,169.72, 180,256.02 and 72,795.16 is: 109,193.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,169.72 : 180,256.02 = 72,795.16 : x
  2. Step 2: Convert to fraction form
    120,169.72/180,256.02 = 72,795.16/x
  3. Step 3: Cross multiply
    120,169.72x = 180,256.02 × 72,795.16
  4. Step 4: Simplify right side
    120,169.72x = 13,121,765,816.86
  5. Step 5: Solve for x
    x = 13,121,765,816.86/120,169.72
  6. Step 6: Final answer
    x = 109,193.61

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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.