Home / 109,021.28-150,511.38-70,815.20

Finding the Fourth Proportional to 109,021.28, 150,511.38 and 70,815.20

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Solution

The fourth proportional to 109,021.28, 150,511.38 and 70,815.20 is: 97,765.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,021.28 : 150,511.38 = 70,815.20 : x
  2. Step 2: Convert to fraction form
    109,021.28/150,511.38 = 70,815.20/x
  3. Step 3: Cross multiply
    109,021.28x = 150,511.38 × 70,815.20
  4. Step 4: Simplify right side
    109,021.28x = 10,658,493,476.98
  5. Step 5: Solve for x
    x = 10,658,493,476.98/109,021.28
  6. Step 6: Final answer
    x = 97,765.26

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1.5x scale

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.