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Finding the Fourth Proportional to 120,348.90, 166,081.02 and 66,630.68

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Solution

The fourth proportional to 120,348.90, 166,081.02 and 66,630.68 is: 91,950.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,348.90 : 166,081.02 = 66,630.68 : x
  2. Step 2: Convert to fraction form
    120,348.90/166,081.02 = 66,630.68/x
  3. Step 3: Cross multiply
    120,348.90x = 166,081.02 × 66,630.68
  4. Step 4: Simplify right side
    120,348.90x = 11,066,091,297.69
  5. Step 5: Solve for x
    x = 11,066,091,297.69/120,348.90
  6. Step 6: Final answer
    x = 91,950.08

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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.