Home / 135,510.21-187,030.31-78,186.60

Finding the Fourth Proportional to 135,510.21, 187,030.31 and 78,186.60

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Solution

The fourth proportional to 135,510.21, 187,030.31 and 78,186.60 is: 107,912.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,510.21 : 187,030.31 = 78,186.60 : x
  2. Step 2: Convert to fraction form
    135,510.21/187,030.31 = 78,186.60/x
  3. Step 3: Cross multiply
    135,510.21x = 187,030.31 × 78,186.60
  4. Step 4: Simplify right side
    135,510.21x = 14,623,263,644.91
  5. Step 5: Solve for x
    x = 14,623,263,644.91/135,510.21
  6. Step 6: Final answer
    x = 107,912.63

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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.