Home / 135,989.35-187,611.54-78,618.11

Finding the Fourth Proportional to 135,989.35, 187,611.54 and 78,618.11

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Solution

The fourth proportional to 135,989.35, 187,611.54 and 78,618.11 is: 108,461.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,989.35 : 187,611.54 = 78,618.11 : x
  2. Step 2: Convert to fraction form
    135,989.35/187,611.54 = 78,618.11/x
  3. Step 3: Cross multiply
    135,989.35x = 187,611.54 × 78,618.11
  4. Step 4: Simplify right side
    135,989.35x = 14,749,664,688.99
  5. Step 5: Solve for x
    x = 14,749,664,688.99/135,989.35
  6. Step 6: Final answer
    x = 108,461.91

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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.