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Finding the Fourth Proportional to 149,562.40, 206,400.72 and 85,912.96

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Solution

The fourth proportional to 149,562.40, 206,400.72 and 85,912.96 is: 118,562.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,562.40 : 206,400.72 = 85,912.96 : x
  2. Step 2: Convert to fraction form
    149,562.40/206,400.72 = 85,912.96/x
  3. Step 3: Cross multiply
    149,562.40x = 206,400.72 × 85,912.96
  4. Step 4: Simplify right side
    149,562.40x = 17,732,496,801.33
  5. Step 5: Solve for x
    x = 17,732,496,801.33/149,562.40
  6. Step 6: Final answer
    x = 118,562.53

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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.