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Finding the Fourth Proportional to 122,171.88, 168,679.32 and 76,301.30

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Solution

The fourth proportional to 122,171.88, 168,679.32 and 76,301.30 is: 105,347.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,171.88 : 168,679.32 = 76,301.30 : x
  2. Step 2: Convert to fraction form
    122,171.88/168,679.32 = 76,301.30/x
  3. Step 3: Cross multiply
    122,171.88x = 168,679.32 × 76,301.30
  4. Step 4: Simplify right side
    122,171.88x = 12,870,451,399.12
  5. Step 5: Solve for x
    x = 12,870,451,399.12/122,171.88
  6. Step 6: Final answer
    x = 105,347.08

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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.