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Finding the Fourth Proportional to 121,992.89, 183,269.69 and 86,542.22

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Solution

The fourth proportional to 121,992.89, 183,269.69 and 86,542.22 is: 130,012.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,992.89 : 183,269.69 = 86,542.22 : x
  2. Step 2: Convert to fraction form
    121,992.89/183,269.69 = 86,542.22/x
  3. Step 3: Cross multiply
    121,992.89x = 183,269.69 × 86,542.22
  4. Step 4: Simplify right side
    121,992.89x = 15,860,564,482.25
  5. Step 5: Solve for x
    x = 15,860,564,482.25/121,992.89
  6. Step 6: Final answer
    x = 130,012.21

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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.