Home / 120,385.14-166,117.82-66,656.64

Finding the Fourth Proportional to 120,385.14, 166,117.82 and 66,656.64

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Solution

The fourth proportional to 120,385.14, 166,117.82 and 66,656.64 is: 91,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,385.14 : 166,117.82 = 66,656.64 : x
  2. Step 2: Convert to fraction form
    120,385.14/166,117.82 = 66,656.64/x
  3. Step 3: Cross multiply
    120,385.14x = 166,117.82 × 66,656.64
  4. Step 4: Simplify right side
    120,385.14x = 11,072,855,725.32
  5. Step 5: Solve for x
    x = 11,072,855,725.32/120,385.14
  6. Step 6: Final answer
    x = 91,978.59

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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.