Home / 120,919.98-166,970.28-100,881.90

Finding the Fourth Proportional to 120,919.98, 166,970.28 and 100,881.90

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Solution

The fourth proportional to 120,919.98, 166,970.28 and 100,881.90 is: 139,301.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,919.98 : 166,970.28 = 100,881.90 : x
  2. Step 2: Convert to fraction form
    120,919.98/166,970.28 = 100,881.90/x
  3. Step 3: Cross multiply
    120,919.98x = 166,970.28 × 100,881.90
  4. Step 4: Simplify right side
    120,919.98x = 16,844,279,089.93
  5. Step 5: Solve for x
    x = 16,844,279,089.93/120,919.98
  6. Step 6: Final answer
    x = 139,301.04

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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.