Home / 135,503.18-187,020.54-78,179.52

Finding the Fourth Proportional to 135,503.18, 187,020.54 and 78,179.52

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Solution

The fourth proportional to 135,503.18, 187,020.54 and 78,179.52 is: 107,902.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,503.18 : 187,020.54 = 78,179.52 : x
  2. Step 2: Convert to fraction form
    135,503.18/187,020.54 = 78,179.52/x
  3. Step 3: Cross multiply
    135,503.18x = 187,020.54 × 78,179.52
  4. Step 4: Simplify right side
    135,503.18x = 14,621,176,047.34
  5. Step 5: Solve for x
    x = 14,621,176,047.34/135,503.18
  6. Step 6: Final answer
    x = 107,902.83

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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.