Home / 126,009.12-189,013.68-86,446.32

Finding the Fourth Proportional to 126,009.12, 189,013.68 and 86,446.32

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Solution

The fourth proportional to 126,009.12, 189,013.68 and 86,446.32 is: 129,669.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,009.12 : 189,013.68 = 86,446.32 : x
  2. Step 2: Convert to fraction form
    126,009.12/189,013.68 = 86,446.32/x
  3. Step 3: Cross multiply
    126,009.12x = 189,013.68 × 86,446.32
  4. Step 4: Simplify right side
    126,009.12x = 16,339,537,065.66
  5. Step 5: Solve for x
    x = 16,339,537,065.66/126,009.12
  6. Step 6: Final answer
    x = 129,669.48

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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.