Home / 135,085.80-186,441.56-78,529.96

Finding the Fourth Proportional to 135,085.80, 186,441.56 and 78,529.96

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Solution

The fourth proportional to 135,085.80, 186,441.56 and 78,529.96 is: 108,384.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,085.80 : 186,441.56 = 78,529.96 : x
  2. Step 2: Convert to fraction form
    135,085.80/186,441.56 = 78,529.96/x
  3. Step 3: Cross multiply
    135,085.80x = 186,441.56 × 78,529.96
  4. Step 4: Simplify right side
    135,085.80x = 14,641,248,249.14
  5. Step 5: Solve for x
    x = 14,641,248,249.14/135,085.80
  6. Step 6: Final answer
    x = 108,384.81

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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.