Home / 90,623.34-135,810.81-68,418.54

Finding the Fourth Proportional to 90,623.34, 135,810.81 and 68,418.54

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Solution

The fourth proportional to 90,623.34, 135,810.81 and 68,418.54 is: 102,534.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,623.34 : 135,810.81 = 68,418.54 : x
  2. Step 2: Convert to fraction form
    90,623.34/135,810.81 = 68,418.54/x
  3. Step 3: Cross multiply
    90,623.34x = 135,810.81 × 68,418.54
  4. Step 4: Simplify right side
    90,623.34x = 9,291,977,336.42
  5. Step 5: Solve for x
    x = 9,291,977,336.42/90,623.34
  6. Step 6: Final answer
    x = 102,534.04

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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.