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Finding the Fourth Proportional to 121,295.61, 181,934.78 and 45,379.71

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Solution

The fourth proportional to 121,295.61, 181,934.78 and 45,379.71 is: 68,066.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,295.61 : 181,934.78 = 45,379.71 : x
  2. Step 2: Convert to fraction form
    121,295.61/181,934.78 = 45,379.71/x
  3. Step 3: Cross multiply
    121,295.61x = 181,934.78 × 45,379.71
  4. Step 4: Simplify right side
    121,295.61x = 8,256,147,328.42
  5. Step 5: Solve for x
    x = 8,256,147,328.42/121,295.61
  6. Step 6: Final answer
    x = 68,066.33

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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.