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Finding the Fourth Proportional to 79,692.51, 119,486.80 and 36,980.40

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Solution

The fourth proportional to 79,692.51, 119,486.80 and 36,980.40 is: 55,446.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,692.51 : 119,486.80 = 36,980.40 : x
  2. Step 2: Convert to fraction form
    79,692.51/119,486.80 = 36,980.40/x
  3. Step 3: Cross multiply
    79,692.51x = 119,486.80 × 36,980.40
  4. Step 4: Simplify right side
    79,692.51x = 4,418,669,272.89
  5. Step 5: Solve for x
    x = 4,418,669,272.89/79,692.51
  6. Step 6: Final answer
    x = 55,446.48

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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.