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Finding the Fourth Proportional to 130,375.99, 179,921.42 and 85,082.95

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Solution

The fourth proportional to 130,375.99, 179,921.42 and 85,082.95 is: 117,416.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,375.99 : 179,921.42 = 85,082.95 : x
  2. Step 2: Convert to fraction form
    130,375.99/179,921.42 = 85,082.95/x
  3. Step 3: Cross multiply
    130,375.99x = 179,921.42 × 85,082.95
  4. Step 4: Simplify right side
    130,375.99x = 15,308,245,181.79
  5. Step 5: Solve for x
    x = 15,308,245,181.79/130,375.99
  6. Step 6: Final answer
    x = 117,416.14

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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.