Home / 137,718.12-189,980.16-91,856.72

Finding the Fourth Proportional to 137,718.12, 189,980.16 and 91,856.72

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Solution

The fourth proportional to 137,718.12, 189,980.16 and 91,856.72 is: 126,715.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,718.12 : 189,980.16 = 91,856.72 : x
  2. Step 2: Convert to fraction form
    137,718.12/189,980.16 = 91,856.72/x
  3. Step 3: Cross multiply
    137,718.12x = 189,980.16 × 91,856.72
  4. Step 4: Simplify right side
    137,718.12x = 17,450,954,362.68
  5. Step 5: Solve for x
    x = 17,450,954,362.68/137,718.12
  6. Step 6: Final answer
    x = 126,715.02

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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.