Home / 70,865.28-106,315.36-20,945.12

Finding the Fourth Proportional to 70,865.28, 106,315.36 and 20,945.12

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Solution

The fourth proportional to 70,865.28, 106,315.36 and 20,945.12 is: 31,422.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,865.28 : 106,315.36 = 20,945.12 : x
  2. Step 2: Convert to fraction form
    70,865.28/106,315.36 = 20,945.12/x
  3. Step 3: Cross multiply
    70,865.28x = 106,315.36 × 20,945.12
  4. Step 4: Simplify right side
    70,865.28x = 2,226,787,973.04
  5. Step 5: Solve for x
    x = 2,226,787,973.04/70,865.28
  6. Step 6: Final answer
    x = 31,422.83

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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.