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Finding the Fourth Proportional to 120,438.01, 165,936.81 and 79,529.49

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Solution

The fourth proportional to 120,438.01, 165,936.81 and 79,529.49 is: 109,573.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,438.01 : 165,936.81 = 79,529.49 : x
  2. Step 2: Convert to fraction form
    120,438.01/165,936.81 = 79,529.49/x
  3. Step 3: Cross multiply
    120,438.01x = 165,936.81 × 79,529.49
  4. Step 4: Simplify right side
    120,438.01x = 13,196,869,871.53
  5. Step 5: Solve for x
    x = 13,196,869,871.53/120,438.01
  6. Step 6: Final answer
    x = 109,573.96

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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.