Home / 126,011.12-189,016.68-86,448.32

Finding the Fourth Proportional to 126,011.12, 189,016.68 and 86,448.32

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Solution

The fourth proportional to 126,011.12, 189,016.68 and 86,448.32 is: 129,672.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,011.12 : 189,016.68 = 86,448.32 : x
  2. Step 2: Convert to fraction form
    126,011.12/189,016.68 = 86,448.32/x
  3. Step 3: Cross multiply
    126,011.12x = 189,016.68 × 86,448.32
  4. Step 4: Simplify right side
    126,011.12x = 16,340,174,437.98
  5. Step 5: Solve for x
    x = 16,340,174,437.98/126,011.12
  6. Step 6: Final answer
    x = 129,672.48

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1.5x scale

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.