Home / 189,366.85-261,216.05-121,359.66

Finding the Fourth Proportional to 189,366.85, 261,216.05 and 121,359.66

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Solution

The fourth proportional to 189,366.85, 261,216.05 and 121,359.66 is: 167,405.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,366.85 : 261,216.05 = 121,359.66 : x
  2. Step 2: Convert to fraction form
    189,366.85/261,216.05 = 121,359.66/x
  3. Step 3: Cross multiply
    189,366.85x = 261,216.05 × 121,359.66
  4. Step 4: Simplify right side
    189,366.85x = 31,701,091,014.54
  5. Step 5: Solve for x
    x = 31,701,091,014.54/189,366.85
  6. Step 6: Final answer
    x = 167,405.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.