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Finding the Fourth Proportional to 120,049.86, 165,666.96 and 66,333.90

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Solution

The fourth proportional to 120,049.86, 165,666.96 and 66,333.90 is: 91,539.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,049.86 : 165,666.96 = 66,333.90 : x
  2. Step 2: Convert to fraction form
    120,049.86/165,666.96 = 66,333.90/x
  3. Step 3: Cross multiply
    120,049.86x = 165,666.96 × 66,333.90
  4. Step 4: Simplify right side
    120,049.86x = 10,989,335,557.94
  5. Step 5: Solve for x
    x = 10,989,335,557.94/120,049.86
  6. Step 6: Final answer
    x = 91,539.76

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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.