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Finding the Fourth Proportional to 120,008.96, 165,520.32 and 72,212.48

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Solution

The fourth proportional to 120,008.96, 165,520.32 and 72,212.48 is: 99,597.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,008.96 : 165,520.32 = 72,212.48 : x
  2. Step 2: Convert to fraction form
    120,008.96/165,520.32 = 72,212.48/x
  3. Step 3: Cross multiply
    120,008.96x = 165,520.32 × 72,212.48
  4. Step 4: Simplify right side
    120,008.96x = 11,952,632,797.59
  5. Step 5: Solve for x
    x = 11,952,632,797.59/120,008.96
  6. Step 6: Final answer
    x = 99,597.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.