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Finding the Fourth Proportional to 121,217.91, 181,854.41 and 36,985.61

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Solution

The fourth proportional to 121,217.91, 181,854.41 and 36,985.61 is: 55,486.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,217.91 : 181,854.41 = 36,985.61 : x
  2. Step 2: Convert to fraction form
    121,217.91/181,854.41 = 36,985.61/x
  3. Step 3: Cross multiply
    121,217.91x = 181,854.41 × 36,985.61
  4. Step 4: Simplify right side
    121,217.91x = 6,725,995,190.84
  5. Step 5: Solve for x
    x = 6,725,995,190.84/121,217.91
  6. Step 6: Final answer
    x = 55,486.81

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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.