Home / 126,007.20-189,010.80-81,392.40

Finding the Fourth Proportional to 126,007.20, 189,010.80 and 81,392.40

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Solution

The fourth proportional to 126,007.20, 189,010.80 and 81,392.40 is: 122,088.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,007.20 : 189,010.80 = 81,392.40 : x
  2. Step 2: Convert to fraction form
    126,007.20/189,010.80 = 81,392.40/x
  3. Step 3: Cross multiply
    126,007.20x = 189,010.80 × 81,392.40
  4. Step 4: Simplify right side
    126,007.20x = 15,384,042,637.92
  5. Step 5: Solve for x
    x = 15,384,042,637.92/126,007.20
  6. Step 6: Final answer
    x = 122,088.60

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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.