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Finding the Fourth Proportional to 120,357.97, 166,099.16 and 66,642.94

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Solution

The fourth proportional to 120,357.97, 166,099.16 and 66,642.94 is: 91,970.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,357.97 : 166,099.16 = 66,642.94 : x
  2. Step 2: Convert to fraction form
    120,357.97/166,099.16 = 66,642.94/x
  3. Step 3: Cross multiply
    120,357.97x = 166,099.16 × 66,642.94
  4. Step 4: Simplify right side
    120,357.97x = 11,069,336,728.16
  5. Step 5: Solve for x
    x = 11,069,336,728.16/120,357.97
  6. Step 6: Final answer
    x = 91,970.12

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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.