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Finding the Fourth Proportional to 121,215.89, 181,852.46 and 38,109.89

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Solution

The fourth proportional to 121,215.89, 181,852.46 and 38,109.89 is: 57,173.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,215.89 : 181,852.46 = 38,109.89 : x
  2. Step 2: Convert to fraction form
    121,215.89/181,852.46 = 38,109.89/x
  3. Step 3: Cross multiply
    121,215.89x = 181,852.46 × 38,109.89
  4. Step 4: Simplify right side
    121,215.89x = 6,930,377,246.83
  5. Step 5: Solve for x
    x = 6,930,377,246.83/121,215.89
  6. Step 6: Final answer
    x = 57,173.83

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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.