Home / 135,086.80-186,442.94-78,530.96

Finding the Fourth Proportional to 135,086.80, 186,442.94 and 78,530.96

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Solution

The fourth proportional to 135,086.80, 186,442.94 and 78,530.96 is: 108,386.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,086.80 : 186,442.94 = 78,530.96 : x
  2. Step 2: Convert to fraction form
    135,086.80/186,442.94 = 78,530.96/x
  3. Step 3: Cross multiply
    135,086.80x = 186,442.94 × 78,530.96
  4. Step 4: Simplify right side
    135,086.80x = 14,641,543,063.42
  5. Step 5: Solve for x
    x = 14,641,543,063.42/135,086.80
  6. Step 6: Final answer
    x = 108,386.19

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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.