Home / 80,986.78-111,688.90-50,775.20

Finding the Fourth Proportional to 80,986.78, 111,688.90 and 50,775.20

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Solution

The fourth proportional to 80,986.78, 111,688.90 and 50,775.20 is: 70,024.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,986.78 : 111,688.90 = 50,775.20 : x
  2. Step 2: Convert to fraction form
    80,986.78/111,688.90 = 50,775.20/x
  3. Step 3: Cross multiply
    80,986.78x = 111,688.90 × 50,775.20
  4. Step 4: Simplify right side
    80,986.78x = 5,671,025,549.90
  5. Step 5: Solve for x
    x = 5,671,025,549.90/80,986.78
  6. Step 6: Final answer
    x = 70,024.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.