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Finding the Fourth Proportional to 120,365.72, 166,102.65 and 66,649.58

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Solution

The fourth proportional to 120,365.72, 166,102.65 and 66,649.58 is: 91,975.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,365.72 : 166,102.65 = 66,649.58 : x
  2. Step 2: Convert to fraction form
    120,365.72/166,102.65 = 66,649.58/x
  3. Step 3: Cross multiply
    120,365.72x = 166,102.65 × 66,649.58
  4. Step 4: Simplify right side
    120,365.72x = 11,070,671,028.87
  5. Step 5: Solve for x
    x = 11,070,671,028.87/120,365.72
  6. Step 6: Final answer
    x = 91,975.29

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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.