Home / 85,984.70-128,975.81-60,579.20

Finding the Fourth Proportional to 85,984.70, 128,975.81 and 60,579.20

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Solution

The fourth proportional to 85,984.70, 128,975.81 and 60,579.20 is: 90,867.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,984.70 : 128,975.81 = 60,579.20 : x
  2. Step 2: Convert to fraction form
    85,984.70/128,975.81 = 60,579.20/x
  3. Step 3: Cross multiply
    85,984.70x = 128,975.81 × 60,579.20
  4. Step 4: Simplify right side
    85,984.70x = 7,813,251,863.04
  5. Step 5: Solve for x
    x = 7,813,251,863.04/85,984.70
  6. Step 6: Final answer
    x = 90,867.94

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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.