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Finding the Fourth Proportional to 120,646.80, 166,491.12 and 66,930.48

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Solution

The fourth proportional to 120,646.80, 166,491.12 and 66,930.48 is: 92,363.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,646.80 : 166,491.12 = 66,930.48 : x
  2. Step 2: Convert to fraction form
    120,646.80/166,491.12 = 66,930.48/x
  3. Step 3: Cross multiply
    120,646.80x = 166,491.12 × 66,930.48
  4. Step 4: Simplify right side
    120,646.80x = 11,143,330,577.34
  5. Step 5: Solve for x
    x = 11,143,330,577.34/120,646.80
  6. Step 6: Final answer
    x = 92,363.25

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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.