Home / 126,048.40-189,072.60-102,428.80

Finding the Fourth Proportional to 126,048.40, 189,072.60 and 102,428.80

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Solution

The fourth proportional to 126,048.40, 189,072.60 and 102,428.80 is: 153,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,048.40 : 189,072.60 = 102,428.80 : x
  2. Step 2: Convert to fraction form
    126,048.40/189,072.60 = 102,428.80/x
  3. Step 3: Cross multiply
    126,048.40x = 189,072.60 × 102,428.80
  4. Step 4: Simplify right side
    126,048.40x = 19,366,479,530.88
  5. Step 5: Solve for x
    x = 19,366,479,530.88/126,048.40
  6. Step 6: Final answer
    x = 153,643.20

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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.