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Finding the Fourth Proportional to 67,280.76, 100,922.90 and 20,533.50

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Solution

The fourth proportional to 67,280.76, 100,922.90 and 20,533.50 is: 30,800.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,280.76 : 100,922.90 = 20,533.50 : x
  2. Step 2: Convert to fraction form
    67,280.76/100,922.90 = 20,533.50/x
  3. Step 3: Cross multiply
    67,280.76x = 100,922.90 × 20,533.50
  4. Step 4: Simplify right side
    67,280.76x = 2,072,300,264.48
  5. Step 5: Solve for x
    x = 2,072,300,264.48/67,280.76
  6. Step 6: Final answer
    x = 30,800.79

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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.