Home / 135,021.94-186,330.27-78,436.96

Finding the Fourth Proportional to 135,021.94, 186,330.27 and 78,436.96

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Solution

The fourth proportional to 135,021.94, 186,330.27 and 78,436.96 is: 108,243.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,021.94 : 186,330.27 = 78,436.96 : x
  2. Step 2: Convert to fraction form
    135,021.94/186,330.27 = 78,436.96/x
  3. Step 3: Cross multiply
    135,021.94x = 186,330.27 × 78,436.96
  4. Step 4: Simplify right side
    135,021.94x = 14,615,179,763.09
  5. Step 5: Solve for x
    x = 14,615,179,763.09/135,021.94
  6. Step 6: Final answer
    x = 108,243.00

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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.