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Finding the Fourth Proportional to 120,866.04, 166,799.78 and 66,420.51

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Solution

The fourth proportional to 120,866.04, 166,799.78 and 66,420.51 is: 91,662.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,866.04 : 166,799.78 = 66,420.51 : x
  2. Step 2: Convert to fraction form
    120,866.04/166,799.78 = 66,420.51/x
  3. Step 3: Cross multiply
    120,866.04x = 166,799.78 × 66,420.51
  4. Step 4: Simplify right side
    120,866.04x = 11,078,925,289.39
  5. Step 5: Solve for x
    x = 11,078,925,289.39/120,866.04
  6. Step 6: Final answer
    x = 91,662.85

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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.