Home / 121,204.40-181,806.60-76,881.20

Finding the Fourth Proportional to 121,204.40, 181,806.60 and 76,881.20

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Solution

The fourth proportional to 121,204.40, 181,806.60 and 76,881.20 is: 115,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,204.40 : 181,806.60 = 76,881.20 : x
  2. Step 2: Convert to fraction form
    121,204.40/181,806.60 = 76,881.20/x
  3. Step 3: Cross multiply
    121,204.40x = 181,806.60 × 76,881.20
  4. Step 4: Simplify right side
    121,204.40x = 13,977,509,575.92
  5. Step 5: Solve for x
    x = 13,977,509,575.92/121,204.40
  6. Step 6: Final answer
    x = 115,321.80

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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.