Home / 126,082.40-189,002.10-72,719.60

Finding the Fourth Proportional to 126,082.40, 189,002.10 and 72,719.60

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Solution

The fourth proportional to 126,082.40, 189,002.10 and 72,719.60 is: 109,009.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,082.40 : 189,002.10 = 72,719.60 : x
  2. Step 2: Convert to fraction form
    126,082.40/189,002.10 = 72,719.60/x
  3. Step 3: Cross multiply
    126,082.40x = 189,002.10 × 72,719.60
  4. Step 4: Simplify right side
    126,082.40x = 13,744,157,111.16
  5. Step 5: Solve for x
    x = 13,744,157,111.16/126,082.40
  6. Step 6: Final answer
    x = 109,009.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.