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Finding the Fourth Proportional to 72,633.21, 100,002.11 and 61,980.09

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Solution

The fourth proportional to 72,633.21, 100,002.11 and 61,980.09 is: 85,334.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,633.21 : 100,002.11 = 61,980.09 : x
  2. Step 2: Convert to fraction form
    72,633.21/100,002.11 = 61,980.09/x
  3. Step 3: Cross multiply
    72,633.21x = 100,002.11 × 61,980.09
  4. Step 4: Simplify right side
    72,633.21x = 6,198,139,468.09
  5. Step 5: Solve for x
    x = 6,198,139,468.09/72,633.21
  6. Step 6: Final answer
    x = 85,334.79

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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.