Home / 60,128.28-90,189.72-20,685.60

Finding the Fourth Proportional to 60,128.28, 90,189.72 and 20,685.60

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Solution

The fourth proportional to 60,128.28, 90,189.72 and 20,685.60 is: 31,027.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,128.28 : 90,189.72 = 20,685.60 : x
  2. Step 2: Convert to fraction form
    60,128.28/90,189.72 = 20,685.60/x
  3. Step 3: Cross multiply
    60,128.28x = 90,189.72 × 20,685.60
  4. Step 4: Simplify right side
    60,128.28x = 1,865,628,472.03
  5. Step 5: Solve for x
    x = 1,865,628,472.03/60,128.28
  6. Step 6: Final answer
    x = 31,027.47

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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.