Home / 81,079.42-121,674.49-28,488.91

Finding the Fourth Proportional to 81,079.42, 121,674.49 and 28,488.91

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Solution

The fourth proportional to 81,079.42, 121,674.49 and 28,488.91 is: 42,752.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079.42 : 121,674.49 = 28,488.91 : x
  2. Step 2: Convert to fraction form
    81,079.42/121,674.49 = 28,488.91/x
  3. Step 3: Cross multiply
    81,079.42x = 121,674.49 × 28,488.91
  4. Step 4: Simplify right side
    81,079.42x = 3,466,372,844.09
  5. Step 5: Solve for x
    x = 3,466,372,844.09/81,079.42
  6. Step 6: Final answer
    x = 42,752.81

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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.