Home / 109,629.80-164,444.70-99,780.20

Finding the Fourth Proportional to 109,629.80, 164,444.70 and 99,780.20

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Solution

The fourth proportional to 109,629.80, 164,444.70 and 99,780.20 is: 149,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,629.80 : 164,444.70 = 99,780.20 : x
  2. Step 2: Convert to fraction form
    109,629.80/164,444.70 = 99,780.20/x
  3. Step 3: Cross multiply
    109,629.80x = 164,444.70 × 99,780.20
  4. Step 4: Simplify right side
    109,629.80x = 16,408,325,054.94
  5. Step 5: Solve for x
    x = 16,408,325,054.94/109,629.80
  6. Step 6: Final answer
    x = 149,670.30

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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.