Home / 85,100.21-117,420.50-49,288.08

Finding the Fourth Proportional to 85,100.21, 117,420.50 and 49,288.08

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Solution

The fourth proportional to 85,100.21, 117,420.50 and 49,288.08 is: 68,007.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,100.21 : 117,420.50 = 49,288.08 : x
  2. Step 2: Convert to fraction form
    85,100.21/117,420.50 = 49,288.08/x
  3. Step 3: Cross multiply
    85,100.21x = 117,420.50 × 49,288.08
  4. Step 4: Simplify right side
    85,100.21x = 5,787,430,997.64
  5. Step 5: Solve for x
    x = 5,787,430,997.64/85,100.21
  6. Step 6: Final answer
    x = 68,007.25

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1.5x scale

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.