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Finding the Fourth Proportional to 149,119.32, 205,790.34 and 85,469.40

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Solution

The fourth proportional to 149,119.32, 205,790.34 and 85,469.40 is: 117,951.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,119.32 : 205,790.34 = 85,469.40 : x
  2. Step 2: Convert to fraction form
    149,119.32/205,790.34 = 85,469.40/x
  3. Step 3: Cross multiply
    149,119.32x = 205,790.34 × 85,469.40
  4. Step 4: Simplify right side
    149,119.32x = 17,588,776,885.60
  5. Step 5: Solve for x
    x = 17,588,776,885.60/149,119.32
  6. Step 6: Final answer
    x = 117,951.03

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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.