Home / 85,541.58-128,313.99-80,914.86

Finding the Fourth Proportional to 85,541.58, 128,313.99 and 80,914.86

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Solution

The fourth proportional to 85,541.58, 128,313.99 and 80,914.86 is: 121,373.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,541.58 : 128,313.99 = 80,914.86 : x
  2. Step 2: Convert to fraction form
    85,541.58/128,313.99 = 80,914.86/x
  3. Step 3: Cross multiply
    85,541.58x = 128,313.99 × 80,914.86
  4. Step 4: Simplify right side
    85,541.58x = 10,382,508,536.89
  5. Step 5: Solve for x
    x = 10,382,508,536.89/85,541.58
  6. Step 6: Final answer
    x = 121,373.82

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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.