Home / 135,708.93-187,286.89-78,358.83

Finding the Fourth Proportional to 135,708.93, 187,286.89 and 78,358.83

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Solution

The fourth proportional to 135,708.93, 187,286.89 and 78,358.83 is: 108,140.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,708.93 : 187,286.89 = 78,358.83 : x
  2. Step 2: Convert to fraction form
    135,708.93/187,286.89 = 78,358.83/x
  3. Step 3: Cross multiply
    135,708.93x = 187,286.89 × 78,358.83
  4. Step 4: Simplify right side
    135,708.93x = 14,675,581,574.74
  5. Step 5: Solve for x
    x = 14,675,581,574.74/135,708.93
  6. Step 6: Final answer
    x = 108,140.13

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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.