Home / 120,991.12-166,970.64-67,278.40

Finding the Fourth Proportional to 120,991.12, 166,970.64 and 67,278.40

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Solution

The fourth proportional to 120,991.12, 166,970.64 and 67,278.40 is: 92,845.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.12 : 166,970.64 = 67,278.40 : x
  2. Step 2: Convert to fraction form
    120,991.12/166,970.64 = 67,278.40/x
  3. Step 3: Cross multiply
    120,991.12x = 166,970.64 × 67,278.40
  4. Step 4: Simplify right side
    120,991.12x = 11,233,517,506.18
  5. Step 5: Solve for x
    x = 11,233,517,506.18/120,991.12
  6. Step 6: Final answer
    x = 92,845.80

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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.