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Finding the Fourth Proportional to 121,238.80, 181,383 and 79,766.80

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Solution

The fourth proportional to 121,238.80, 181,383 and 79,766.80 is: 119,337.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,238.80 : 181,383 = 79,766.80 : x
  2. Step 2: Convert to fraction form
    121,238.80/181,383 = 79,766.80/x
  3. Step 3: Cross multiply
    121,238.80x = 181,383 × 79,766.80
  4. Step 4: Simplify right side
    121,238.80x = 14,468,341,484.40
  5. Step 5: Solve for x
    x = 14,468,341,484.40/121,238.80
  6. Step 6: Final answer
    x = 119,337.55

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1.5x scale

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.