Home / 90,782.55-136,173.83-86,943.15

Finding the Fourth Proportional to 90,782.55, 136,173.83 and 86,943.15

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Solution

The fourth proportional to 90,782.55, 136,173.83 and 86,943.15 is: 130,414.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,782.55 : 136,173.83 = 86,943.15 : x
  2. Step 2: Convert to fraction form
    90,782.55/136,173.83 = 86,943.15/x
  3. Step 3: Cross multiply
    90,782.55x = 136,173.83 × 86,943.15
  4. Step 4: Simplify right side
    90,782.55x = 11,839,381,293.05
  5. Step 5: Solve for x
    x = 11,839,381,293.05/90,782.55
  6. Step 6: Final answer
    x = 130,414.73

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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.