Home / 121,012.20-181,518.30-76,834.80

Finding the Fourth Proportional to 121,012.20, 181,518.30 and 76,834.80

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Solution

The fourth proportional to 121,012.20, 181,518.30 and 76,834.80 is: 115,252.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,012.20 : 181,518.30 = 76,834.80 : x
  2. Step 2: Convert to fraction form
    121,012.20/181,518.30 = 76,834.80/x
  3. Step 3: Cross multiply
    121,012.20x = 181,518.30 × 76,834.80
  4. Step 4: Simplify right side
    121,012.20x = 13,946,922,276.84
  5. Step 5: Solve for x
    x = 13,946,922,276.84/121,012.20
  6. Step 6: Final answer
    x = 115,252.20

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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.