Home / 90,786.70-136,180.05-86,704.30

Finding the Fourth Proportional to 90,786.70, 136,180.05 and 86,704.30

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Solution

The fourth proportional to 90,786.70, 136,180.05 and 86,704.30 is: 130,056.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,786.70 : 136,180.05 = 86,704.30 : x
  2. Step 2: Convert to fraction form
    90,786.70/136,180.05 = 86,704.30/x
  3. Step 3: Cross multiply
    90,786.70x = 136,180.05 × 86,704.30
  4. Step 4: Simplify right side
    90,786.70x = 11,807,395,909.22
  5. Step 5: Solve for x
    x = 11,807,395,909.22/90,786.70
  6. Step 6: Final answer
    x = 130,056.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.