Home / 120,991.60-181,444.20-42,108.40

Finding the Fourth Proportional to 120,991.60, 181,444.20 and 42,108.40

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Solution

The fourth proportional to 120,991.60, 181,444.20 and 42,108.40 is: 63,147.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.60 : 181,444.20 = 42,108.40 : x
  2. Step 2: Convert to fraction form
    120,991.60/181,444.20 = 42,108.40/x
  3. Step 3: Cross multiply
    120,991.60x = 181,444.20 × 42,108.40
  4. Step 4: Simplify right side
    120,991.60x = 7,640,324,951.28
  5. Step 5: Solve for x
    x = 7,640,324,951.28/120,991.60
  6. Step 6: Final answer
    x = 63,147.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.