Home / 81,007.28-121,511.88-28,418.24

Finding the Fourth Proportional to 81,007.28, 121,511.88 and 28,418.24

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Solution

The fourth proportional to 81,007.28, 121,511.88 and 28,418.24 is: 42,627.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,007.28 : 121,511.88 = 28,418.24 : x
  2. Step 2: Convert to fraction form
    81,007.28/121,511.88 = 28,418.24/x
  3. Step 3: Cross multiply
    81,007.28x = 121,511.88 × 28,418.24
  4. Step 4: Simplify right side
    81,007.28x = 3,453,153,768.69
  5. Step 5: Solve for x
    x = 3,453,153,768.69/81,007.28
  6. Step 6: Final answer
    x = 42,627.70

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1.5x scale

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.