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Finding the Fourth Proportional to 120,669.90, 166,521.90 and 66,953.76

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Solution

The fourth proportional to 120,669.90, 166,521.90 and 66,953.76 is: 92,394.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,669.90 : 166,521.90 = 66,953.76 : x
  2. Step 2: Convert to fraction form
    120,669.90/166,521.90 = 66,953.76/x
  3. Step 3: Cross multiply
    120,669.90x = 166,521.90 × 66,953.76
  4. Step 4: Simplify right side
    120,669.90x = 11,149,267,327.34
  5. Step 5: Solve for x
    x = 11,149,267,327.34/120,669.90
  6. Step 6: Final answer
    x = 92,394.77

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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.