Home / 137,679.08-189,974.58-81,082.76

Finding the Fourth Proportional to 137,679.08, 189,974.58 and 81,082.76

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Solution

The fourth proportional to 137,679.08, 189,974.58 and 81,082.76 is: 111,880.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,679.08 : 189,974.58 = 81,082.76 : x
  2. Step 2: Convert to fraction form
    137,679.08/189,974.58 = 81,082.76/x
  3. Step 3: Cross multiply
    137,679.08x = 189,974.58 × 81,082.76
  4. Step 4: Simplify right side
    137,679.08x = 15,403,663,276.24
  5. Step 5: Solve for x
    x = 15,403,663,276.24/137,679.08
  6. Step 6: Final answer
    x = 111,880.93

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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.