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Finding the Fourth Proportional to 120,628.92, 166,314.84 and 86,214.72

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Solution

The fourth proportional to 120,628.92, 166,314.84 and 86,214.72 is: 118,866.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,628.92 : 166,314.84 = 86,214.72 : x
  2. Step 2: Convert to fraction form
    120,628.92/166,314.84 = 86,214.72/x
  3. Step 3: Cross multiply
    120,628.92x = 166,314.84 × 86,214.72
  4. Step 4: Simplify right side
    120,628.92x = 14,338,787,362.44
  5. Step 5: Solve for x
    x = 14,338,787,362.44/120,628.92
  6. Step 6: Final answer
    x = 118,866.91

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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.