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Finding the Fourth Proportional to 120,992.32, 166,970.46 and 66,545.56

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Solution

The fourth proportional to 120,992.32, 166,970.46 and 66,545.56 is: 91,833.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,992.32 : 166,970.46 = 66,545.56 : x
  2. Step 2: Convert to fraction form
    120,992.32/166,970.46 = 66,545.56/x
  3. Step 3: Cross multiply
    120,992.32x = 166,970.46 × 66,545.56
  4. Step 4: Simplify right side
    120,992.32x = 11,111,142,764.16
  5. Step 5: Solve for x
    x = 11,111,142,764.16/120,992.32
  6. Step 6: Final answer
    x = 91,833.45

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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.