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Finding the Fourth Proportional to 120,742.88, 166,645.12 and 67,045.12

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Solution

The fourth proportional to 120,742.88, 166,645.12 and 67,045.12 is: 92,533.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,742.88 : 166,645.12 = 67,045.12 : x
  2. Step 2: Convert to fraction form
    120,742.88/166,645.12 = 67,045.12/x
  3. Step 3: Cross multiply
    120,742.88x = 166,645.12 × 67,045.12
  4. Step 4: Simplify right side
    120,742.88x = 11,172,742,067.81
  5. Step 5: Solve for x
    x = 11,172,742,067.81/120,742.88
  6. Step 6: Final answer
    x = 92,533.34

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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.