Home / 135,730.18-187,323.81-78,383.48

Finding the Fourth Proportional to 135,730.18, 187,323.81 and 78,383.48

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Solution

The fourth proportional to 135,730.18, 187,323.81 and 78,383.48 is: 108,178.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,730.18 : 187,323.81 = 78,383.48 : x
  2. Step 2: Convert to fraction form
    135,730.18/187,323.81 = 78,383.48/x
  3. Step 3: Cross multiply
    135,730.18x = 187,323.81 × 78,383.48
  4. Step 4: Simplify right side
    135,730.18x = 14,683,092,114.66
  5. Step 5: Solve for x
    x = 14,683,092,114.66/135,730.18
  6. Step 6: Final answer
    x = 108,178.54

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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.