Home / 120,921.98-166,973.04-100,883.90

Finding the Fourth Proportional to 120,921.98, 166,973.04 and 100,883.90

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Solution

The fourth proportional to 120,921.98, 166,973.04 and 100,883.90 is: 139,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,921.98 : 166,973.04 = 100,883.90 : x
  2. Step 2: Convert to fraction form
    120,921.98/166,973.04 = 100,883.90/x
  3. Step 3: Cross multiply
    120,921.98x = 166,973.04 × 100,883.90
  4. Step 4: Simplify right side
    120,921.98x = 16,844,891,470.06
  5. Step 5: Solve for x
    x = 16,844,891,470.06/120,921.98
  6. Step 6: Final answer
    x = 139,303.80

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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.