Home / 128,170.40-192,273.96-39,431.36

Finding the Fourth Proportional to 128,170.40, 192,273.96 and 39,431.36

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Solution

The fourth proportional to 128,170.40, 192,273.96 and 39,431.36 is: 59,152.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,170.40 : 192,273.96 = 39,431.36 : x
  2. Step 2: Convert to fraction form
    128,170.40/192,273.96 = 39,431.36/x
  3. Step 3: Cross multiply
    128,170.40x = 192,273.96 × 39,431.36
  4. Step 4: Simplify right side
    128,170.40x = 7,581,622,774.02
  5. Step 5: Solve for x
    x = 7,581,622,774.02/128,170.40
  6. Step 6: Final answer
    x = 59,152.68

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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.