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Finding the Fourth Proportional to 61,810.80, 92,692.10 and 21,276.65

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Solution

The fourth proportional to 61,810.80, 92,692.10 and 21,276.65 is: 31,906.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,810.80 : 92,692.10 = 21,276.65 : x
  2. Step 2: Convert to fraction form
    61,810.80/92,692.10 = 21,276.65/x
  3. Step 3: Cross multiply
    61,810.80x = 92,692.10 × 21,276.65
  4. Step 4: Simplify right side
    61,810.80x = 1,972,176,799.62
  5. Step 5: Solve for x
    x = 1,972,176,799.62/61,810.80
  6. Step 6: Final answer
    x = 31,906.67

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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.