Home / 85,958.38-128,938.43-25,987.34

Finding the Fourth Proportional to 85,958.38, 128,938.43 and 25,987.34

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Solution

The fourth proportional to 85,958.38, 128,938.43 and 25,987.34 is: 38,981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,958.38 : 128,938.43 = 25,987.34 : x
  2. Step 2: Convert to fraction form
    85,958.38/128,938.43 = 25,987.34/x
  3. Step 3: Cross multiply
    85,958.38x = 128,938.43 × 25,987.34
  4. Step 4: Simplify right side
    85,958.38x = 3,350,766,819.48
  5. Step 5: Solve for x
    x = 3,350,766,819.48/85,958.38
  6. Step 6: Final answer
    x = 38,981.27

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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.