Home / 120,815.88-166,744.11-86,936.52

Finding the Fourth Proportional to 120,815.88, 166,744.11 and 86,936.52

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Solution

The fourth proportional to 120,815.88, 166,744.11 and 86,936.52 is: 119,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,815.88 : 166,744.11 = 86,936.52 : x
  2. Step 2: Convert to fraction form
    120,815.88/166,744.11 = 86,936.52/x
  3. Step 3: Cross multiply
    120,815.88x = 166,744.11 × 86,936.52
  4. Step 4: Simplify right side
    120,815.88x = 14,496,152,653.90
  5. Step 5: Solve for x
    x = 14,496,152,653.90/120,815.88
  6. Step 6: Final answer
    x = 119,985.49

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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.