Home / 121,965.10-182,947.65-80,109.70

Finding the Fourth Proportional to 121,965.10, 182,947.65 and 80,109.70

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Solution

The fourth proportional to 121,965.10, 182,947.65 and 80,109.70 is: 120,164.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,965.10 : 182,947.65 = 80,109.70 : x
  2. Step 2: Convert to fraction form
    121,965.10/182,947.65 = 80,109.70/x
  3. Step 3: Cross multiply
    121,965.10x = 182,947.65 × 80,109.70
  4. Step 4: Simplify right side
    121,965.10x = 14,655,881,357.21
  5. Step 5: Solve for x
    x = 14,655,881,357.21/121,965.10
  6. Step 6: Final answer
    x = 120,164.55

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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.