Home / 85,812.20-128,718.30-50,791.40

Finding the Fourth Proportional to 85,812.20, 128,718.30 and 50,791.40

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Solution

The fourth proportional to 85,812.20, 128,718.30 and 50,791.40 is: 76,187.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,812.20 : 128,718.30 = 50,791.40 : x
  2. Step 2: Convert to fraction form
    85,812.20/128,718.30 = 50,791.40/x
  3. Step 3: Cross multiply
    85,812.20x = 128,718.30 × 50,791.40
  4. Step 4: Simplify right side
    85,812.20x = 6,537,782,662.62
  5. Step 5: Solve for x
    x = 6,537,782,662.62/85,812.20
  6. Step 6: Final answer
    x = 76,187.10

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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.