Home / 137,719.12-189,981.54-91,857.72

Finding the Fourth Proportional to 137,719.12, 189,981.54 and 91,857.72

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Solution

The fourth proportional to 137,719.12, 189,981.54 and 91,857.72 is: 126,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,719.12 : 189,981.54 = 91,857.72 : x
  2. Step 2: Convert to fraction form
    137,719.12/189,981.54 = 91,857.72/x
  3. Step 3: Cross multiply
    137,719.12x = 189,981.54 × 91,857.72
  4. Step 4: Simplify right side
    137,719.12x = 17,451,271,106.49
  5. Step 5: Solve for x
    x = 17,451,271,106.49/137,719.12
  6. Step 6: Final answer
    x = 126,716.40

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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.