Home / 85,459.20-128,221.62-60,182.97

Finding the Fourth Proportional to 85,459.20, 128,221.62 and 60,182.97

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Solution

The fourth proportional to 85,459.20, 128,221.62 and 60,182.97 is: 90,297.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,459.20 : 128,221.62 = 60,182.97 : x
  2. Step 2: Convert to fraction form
    85,459.20/128,221.62 = 60,182.97/x
  3. Step 3: Cross multiply
    85,459.20x = 128,221.62 × 60,182.97
  4. Step 4: Simplify right side
    85,459.20x = 7,716,757,909.81
  5. Step 5: Solve for x
    x = 7,716,757,909.81/85,459.20
  6. Step 6: Final answer
    x = 90,297.57

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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.