Home / 135,145.72-186,530.70-78,589.72

Finding the Fourth Proportional to 135,145.72, 186,530.70 and 78,589.72

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Solution

The fourth proportional to 135,145.72, 186,530.70 and 78,589.72 is: 108,471.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,145.72 : 186,530.70 = 78,589.72 : x
  2. Step 2: Convert to fraction form
    135,145.72/186,530.70 = 78,589.72/x
  3. Step 3: Cross multiply
    135,145.72x = 186,530.70 × 78,589.72
  4. Step 4: Simplify right side
    135,145.72x = 14,659,395,484.40
  5. Step 5: Solve for x
    x = 14,659,395,484.40/135,145.72
  6. Step 6: Final answer
    x = 108,471.03

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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.