Home / 135,740.52-187,338.54-78,379.70

Finding the Fourth Proportional to 135,740.52, 187,338.54 and 78,379.70

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Solution

The fourth proportional to 135,740.52, 187,338.54 and 78,379.70 is: 108,173.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,740.52 : 187,338.54 = 78,379.70 : x
  2. Step 2: Convert to fraction form
    135,740.52/187,338.54 = 78,379.70/x
  3. Step 3: Cross multiply
    135,740.52x = 187,338.54 × 78,379.70
  4. Step 4: Simplify right side
    135,740.52x = 14,683,537,626.95
  5. Step 5: Solve for x
    x = 14,683,537,626.95/135,740.52
  6. Step 6: Final answer
    x = 108,173.58

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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.