Home / 85,513.08-128,271.78-40,523.88

Finding the Fourth Proportional to 85,513.08, 128,271.78 and 40,523.88

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Solution

The fourth proportional to 85,513.08, 128,271.78 and 40,523.88 is: 60,786.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,513.08 : 128,271.78 = 40,523.88 : x
  2. Step 2: Convert to fraction form
    85,513.08/128,271.78 = 40,523.88/x
  3. Step 3: Cross multiply
    85,513.08x = 128,271.78 × 40,523.88
  4. Step 4: Simplify right side
    85,513.08x = 5,198,070,220.11
  5. Step 5: Solve for x
    x = 5,198,070,220.11/85,513.08
  6. Step 6: Final answer
    x = 60,786.84

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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.