Home / 121,388.20-181,985.10-51,209.80

Finding the Fourth Proportional to 121,388.20, 181,985.10 and 51,209.80

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Solution

The fourth proportional to 121,388.20, 181,985.10 and 51,209.80 is: 76,773.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,388.20 : 181,985.10 = 51,209.80 : x
  2. Step 2: Convert to fraction form
    121,388.20/181,985.10 = 51,209.80/x
  3. Step 3: Cross multiply
    121,388.20x = 181,985.10 × 51,209.80
  4. Step 4: Simplify right side
    121,388.20x = 9,319,420,573.98
  5. Step 5: Solve for x
    x = 9,319,420,573.98/121,388.20
  6. Step 6: Final answer
    x = 76,773.69

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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.