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Finding the Fourth Proportional to 67,210.55, 100,830.45 and 20,462.21

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Solution

The fourth proportional to 67,210.55, 100,830.45 and 20,462.21 is: 30,697.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,210.55 : 100,830.45 = 20,462.21 : x
  2. Step 2: Convert to fraction form
    67,210.55/100,830.45 = 20,462.21/x
  3. Step 3: Cross multiply
    67,210.55x = 100,830.45 × 20,462.21
  4. Step 4: Simplify right side
    67,210.55x = 2,063,213,338.14
  5. Step 5: Solve for x
    x = 2,063,213,338.14/67,210.55
  6. Step 6: Final answer
    x = 30,697.76

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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.