Home / 128,459.28-192,707.44-39,720.56

Finding the Fourth Proportional to 128,459.28, 192,707.44 and 39,720.56

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Solution

The fourth proportional to 128,459.28, 192,707.44 and 39,720.56 is: 59,586.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,459.28 : 192,707.44 = 39,720.56 : x
  2. Step 2: Convert to fraction form
    128,459.28/192,707.44 = 39,720.56/x
  3. Step 3: Cross multiply
    128,459.28x = 192,707.44 × 39,720.56
  4. Step 4: Simplify right side
    128,459.28x = 7,654,447,432.97
  5. Step 5: Solve for x
    x = 7,654,447,432.97/128,459.28
  6. Step 6: Final answer
    x = 59,586.57

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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.