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Finding the Fourth Proportional to 123,072.70, 184,609.05 and 70,438.90

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Solution

The fourth proportional to 123,072.70, 184,609.05 and 70,438.90 is: 105,658.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,072.70 : 184,609.05 = 70,438.90 : x
  2. Step 2: Convert to fraction form
    123,072.70/184,609.05 = 70,438.90/x
  3. Step 3: Cross multiply
    123,072.70x = 184,609.05 × 70,438.90
  4. Step 4: Simplify right side
    123,072.70x = 13,003,658,412.05
  5. Step 5: Solve for x
    x = 13,003,658,412.05/123,072.70
  6. Step 6: Final answer
    x = 105,658.35

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Similar ratio
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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.