Home / 121,026.72-166,899.60-80,742.12

Finding the Fourth Proportional to 121,026.72, 166,899.60 and 80,742.12

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Solution

The fourth proportional to 121,026.72, 166,899.60 and 80,742.12 is: 111,345.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,026.72 : 166,899.60 = 80,742.12 : x
  2. Step 2: Convert to fraction form
    121,026.72/166,899.60 = 80,742.12/x
  3. Step 3: Cross multiply
    121,026.72x = 166,899.60 × 80,742.12
  4. Step 4: Simplify right side
    121,026.72x = 13,475,827,531.15
  5. Step 5: Solve for x
    x = 13,475,827,531.15/121,026.72
  6. Step 6: Final answer
    x = 111,345.89

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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.