Home / 85,617.45-118,138.28-53,763.80

Finding the Fourth Proportional to 85,617.45, 118,138.28 and 53,763.80

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Solution

The fourth proportional to 85,617.45, 118,138.28 and 53,763.80 is: 74,185.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,617.45 : 118,138.28 = 53,763.80 : x
  2. Step 2: Convert to fraction form
    85,617.45/118,138.28 = 53,763.80/x
  3. Step 3: Cross multiply
    85,617.45x = 118,138.28 × 53,763.80
  4. Step 4: Simplify right side
    85,617.45x = 6,351,561,998.75
  5. Step 5: Solve for x
    x = 6,351,561,998.75/85,617.45
  6. Step 6: Final answer
    x = 74,185.37

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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.