Home / 123,308.64-170,166-66,719.88

Finding the Fourth Proportional to 123,308.64, 170,166 and 66,719.88

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Solution

The fourth proportional to 123,308.64, 170,166 and 66,719.88 is: 92,073.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,308.64 : 170,166 = 66,719.88 : x
  2. Step 2: Convert to fraction form
    123,308.64/170,166 = 66,719.88/x
  3. Step 3: Cross multiply
    123,308.64x = 170,166 × 66,719.88
  4. Step 4: Simplify right side
    123,308.64x = 11,353,455,100.08
  5. Step 5: Solve for x
    x = 11,353,455,100.08/123,308.64
  6. Step 6: Final answer
    x = 92,073.48

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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.