Home / 109,129.80-163,464.30-90,697.80

Finding the Fourth Proportional to 109,129.80, 163,464.30 and 90,697.80

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Solution

The fourth proportional to 109,129.80, 163,464.30 and 90,697.80 is: 135,855.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,129.80 : 163,464.30 = 90,697.80 : x
  2. Step 2: Convert to fraction form
    109,129.80/163,464.30 = 90,697.80/x
  3. Step 3: Cross multiply
    109,129.80x = 163,464.30 × 90,697.80
  4. Step 4: Simplify right side
    109,129.80x = 14,825,852,388.54
  5. Step 5: Solve for x
    x = 14,825,852,388.54/109,129.80
  6. Step 6: Final answer
    x = 135,855.21

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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.