Home / 80,752.64-121,145.16-28,148

Finding the Fourth Proportional to 80,752.64, 121,145.16 and 28,148

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Solution

The fourth proportional to 80,752.64, 121,145.16 and 28,148 is: 42,227.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,752.64 : 121,145.16 = 28,148 : x
  2. Step 2: Convert to fraction form
    80,752.64/121,145.16 = 28,148/x
  3. Step 3: Cross multiply
    80,752.64x = 121,145.16 × 28,148
  4. Step 4: Simplify right side
    80,752.64x = 3,409,993,963.68
  5. Step 5: Solve for x
    x = 3,409,993,963.68/80,752.64
  6. Step 6: Final answer
    x = 42,227.65

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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.