Home / 109,619.80-164,429.70-99,770.20

Finding the Fourth Proportional to 109,619.80, 164,429.70 and 99,770.20

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Solution

The fourth proportional to 109,619.80, 164,429.70 and 99,770.20 is: 149,655.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,619.80 : 164,429.70 = 99,770.20 : x
  2. Step 2: Convert to fraction form
    109,619.80/164,429.70 = 99,770.20/x
  3. Step 3: Cross multiply
    109,619.80x = 164,429.70 × 99,770.20
  4. Step 4: Simplify right side
    109,619.80x = 16,405,184,054.94
  5. Step 5: Solve for x
    x = 16,405,184,054.94/109,619.80
  6. Step 6: Final answer
    x = 149,655.30

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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.