Home / 120,665.34-166,517.10-69,688.80

Finding the Fourth Proportional to 120,665.34, 166,517.10 and 69,688.80

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Solution

The fourth proportional to 120,665.34, 166,517.10 and 69,688.80 is: 96,169.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,665.34 : 166,517.10 = 69,688.80 : x
  2. Step 2: Convert to fraction form
    120,665.34/166,517.10 = 69,688.80/x
  3. Step 3: Cross multiply
    120,665.34x = 166,517.10 × 69,688.80
  4. Step 4: Simplify right side
    120,665.34x = 11,604,376,878.48
  5. Step 5: Solve for x
    x = 11,604,376,878.48/120,665.34
  6. Step 6: Final answer
    x = 96,169.93

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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.