Home / 121,982.10-182,973.15-80,126.70

Finding the Fourth Proportional to 121,982.10, 182,973.15 and 80,126.70

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Solution

The fourth proportional to 121,982.10, 182,973.15 and 80,126.70 is: 120,190.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,982.10 : 182,973.15 = 80,126.70 : x
  2. Step 2: Convert to fraction form
    121,982.10/182,973.15 = 80,126.70/x
  3. Step 3: Cross multiply
    121,982.10x = 182,973.15 × 80,126.70
  4. Step 4: Simplify right side
    121,982.10x = 14,661,034,698.11
  5. Step 5: Solve for x
    x = 14,661,034,698.11/121,982.10
  6. Step 6: Final answer
    x = 120,190.05

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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.