Home / 121,030.40-181,351.20-79,428.80

Finding the Fourth Proportional to 121,030.40, 181,351.20 and 79,428.80

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Solution

The fourth proportional to 121,030.40, 181,351.20 and 79,428.80 is: 119,015.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,030.40 : 181,351.20 = 79,428.80 : x
  2. Step 2: Convert to fraction form
    121,030.40/181,351.20 = 79,428.80/x
  3. Step 3: Cross multiply
    121,030.40x = 181,351.20 × 79,428.80
  4. Step 4: Simplify right side
    121,030.40x = 14,404,508,194.56
  5. Step 5: Solve for x
    x = 14,404,508,194.56/121,030.40
  6. Step 6: Final answer
    x = 119,015.62

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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.