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Finding the Fourth Proportional to 79,985.06, 120,100.90 and 67,666.94

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Solution

The fourth proportional to 79,985.06, 120,100.90 and 67,666.94 is: 101,604.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,985.06 : 120,100.90 = 67,666.94 : x
  2. Step 2: Convert to fraction form
    79,985.06/120,100.90 = 67,666.94/x
  3. Step 3: Cross multiply
    79,985.06x = 120,100.90 × 67,666.94
  4. Step 4: Simplify right side
    79,985.06x = 8,126,860,394.25
  5. Step 5: Solve for x
    x = 8,126,860,394.25/79,985.06
  6. Step 6: Final answer
    x = 101,604.73

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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.