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Finding the Fourth Proportional to 80,602.45, 120,903.51 and 21,438.18

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Solution

The fourth proportional to 80,602.45, 120,903.51 and 21,438.18 is: 32,157.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,602.45 : 120,903.51 = 21,438.18 : x
  2. Step 2: Convert to fraction form
    80,602.45/120,903.51 = 21,438.18/x
  3. Step 3: Cross multiply
    80,602.45x = 120,903.51 × 21,438.18
  4. Step 4: Simplify right side
    80,602.45x = 2,591,951,210.01
  5. Step 5: Solve for x
    x = 2,591,951,210.01/80,602.45
  6. Step 6: Final answer
    x = 32,157.23

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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.