Home / 67,178.28-100,763.76-20,427.50

Finding the Fourth Proportional to 67,178.28, 100,763.76 and 20,427.50

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Solution

The fourth proportional to 67,178.28, 100,763.76 and 20,427.50 is: 30,640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,178.28 : 100,763.76 = 20,427.50 : x
  2. Step 2: Convert to fraction form
    67,178.28/100,763.76 = 20,427.50/x
  3. Step 3: Cross multiply
    67,178.28x = 100,763.76 × 20,427.50
  4. Step 4: Simplify right side
    67,178.28x = 2,058,351,707.40
  5. Step 5: Solve for x
    x = 2,058,351,707.40/67,178.28
  6. Step 6: Final answer
    x = 30,640.14

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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.