Home / 136,135.89-187,852.10-78,766.29

Finding the Fourth Proportional to 136,135.89, 187,852.10 and 78,766.29

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Solution

The fourth proportional to 136,135.89, 187,852.10 and 78,766.29 is: 108,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,135.89 : 187,852.10 = 78,766.29 : x
  2. Step 2: Convert to fraction form
    136,135.89/187,852.10 = 78,766.29/x
  3. Step 3: Cross multiply
    136,135.89x = 187,852.10 × 78,766.29
  4. Step 4: Simplify right side
    136,135.89x = 14,796,412,591.88
  5. Step 5: Solve for x
    x = 14,796,412,591.88/136,135.89
  6. Step 6: Final answer
    x = 108,688.55

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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.