Home / 135,618.23-187,154.87-78,269.47

Finding the Fourth Proportional to 135,618.23, 187,154.87 and 78,269.47

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Solution

The fourth proportional to 135,618.23, 187,154.87 and 78,269.47 is: 108,012.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,618.23 : 187,154.87 = 78,269.47 : x
  2. Step 2: Convert to fraction form
    135,618.23/187,154.87 = 78,269.47/x
  3. Step 3: Cross multiply
    135,618.23x = 187,154.87 × 78,269.47
  4. Step 4: Simplify right side
    135,618.23x = 14,648,511,623.58
  5. Step 5: Solve for x
    x = 14,648,511,623.58/135,618.23
  6. Step 6: Final answer
    x = 108,012.85

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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.