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Finding the Fourth Proportional to 143,900.80, 198,537.60 and 87,308.80

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Solution

The fourth proportional to 143,900.80, 198,537.60 and 87,308.80 is: 120,458.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,900.80 : 198,537.60 = 87,308.80 : x
  2. Step 2: Convert to fraction form
    143,900.80/198,537.60 = 87,308.80/x
  3. Step 3: Cross multiply
    143,900.80x = 198,537.60 × 87,308.80
  4. Step 4: Simplify right side
    143,900.80x = 17,334,079,610.88
  5. Step 5: Solve for x
    x = 17,334,079,610.88/143,900.80
  6. Step 6: Final answer
    x = 120,458.54

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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.