Home / 85,280.82-117,719.96-64,121.55

Finding the Fourth Proportional to 85,280.82, 117,719.96 and 64,121.55

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Solution

The fourth proportional to 85,280.82, 117,719.96 and 64,121.55 is: 88,512.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.82 : 117,719.96 = 64,121.55 : x
  2. Step 2: Convert to fraction form
    85,280.82/117,719.96 = 64,121.55/x
  3. Step 3: Cross multiply
    85,280.82x = 117,719.96 × 64,121.55
  4. Step 4: Simplify right side
    85,280.82x = 7,548,385,980.53
  5. Step 5: Solve for x
    x = 7,548,385,980.53/85,280.82
  6. Step 6: Final answer
    x = 88,512.12

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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.