Home / 126,210.40-189,085.20-76,904.80

Finding the Fourth Proportional to 126,210.40, 189,085.20 and 76,904.80

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Solution

The fourth proportional to 126,210.40, 189,085.20 and 76,904.80 is: 115,216.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,210.40 : 189,085.20 = 76,904.80 : x
  2. Step 2: Convert to fraction form
    126,210.40/189,085.20 = 76,904.80/x
  3. Step 3: Cross multiply
    126,210.40x = 189,085.20 × 76,904.80
  4. Step 4: Simplify right side
    126,210.40x = 14,541,559,488.96
  5. Step 5: Solve for x
    x = 14,541,559,488.96/126,210.40
  6. Step 6: Final answer
    x = 115,216.81

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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.