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Finding the Fourth Proportional to 120,369.69, 166,108.12 and 66,653.56

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Solution

The fourth proportional to 120,369.69, 166,108.12 and 66,653.56 is: 91,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,369.69 : 166,108.12 = 66,653.56 : x
  2. Step 2: Convert to fraction form
    120,369.69/166,108.12 = 66,653.56/x
  3. Step 3: Cross multiply
    120,369.69x = 166,108.12 × 66,653.56
  4. Step 4: Simplify right side
    120,369.69x = 11,071,696,712.37
  5. Step 5: Solve for x
    x = 11,071,696,712.37/120,369.69
  6. Step 6: Final answer
    x = 91,980.77

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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.