Home / 149,260.80-205,979.56-81,276.72

Finding the Fourth Proportional to 149,260.80, 205,979.56 and 81,276.72

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Solution

The fourth proportional to 149,260.80, 205,979.56 and 81,276.72 is: 112,161.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,260.80 : 205,979.56 = 81,276.72 : x
  2. Step 2: Convert to fraction form
    149,260.80/205,979.56 = 81,276.72/x
  3. Step 3: Cross multiply
    149,260.80x = 205,979.56 × 81,276.72
  4. Step 4: Simplify right side
    149,260.80x = 16,741,343,023.84
  5. Step 5: Solve for x
    x = 16,741,343,023.84/149,260.80
  6. Step 6: Final answer
    x = 112,161.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.