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Finding the Fourth Proportional to 120,476.90, 166,262.41 and 72,720.92

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Solution

The fourth proportional to 120,476.90, 166,262.41 and 72,720.92 is: 100,357.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,476.90 : 166,262.41 = 72,720.92 : x
  2. Step 2: Convert to fraction form
    120,476.90/166,262.41 = 72,720.92/x
  3. Step 3: Cross multiply
    120,476.90x = 166,262.41 × 72,720.92
  4. Step 4: Simplify right side
    120,476.90x = 12,090,755,416.62
  5. Step 5: Solve for x
    x = 12,090,755,416.62/120,476.90
  6. Step 6: Final answer
    x = 100,357.46

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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.