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Finding the Fourth Proportional to 139,692.98, 192,776.30 and 76,031.23

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Solution

The fourth proportional to 139,692.98, 192,776.30 and 76,031.23 is: 104,923.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,692.98 : 192,776.30 = 76,031.23 : x
  2. Step 2: Convert to fraction form
    139,692.98/192,776.30 = 76,031.23/x
  3. Step 3: Cross multiply
    139,692.98x = 192,776.30 × 76,031.23
  4. Step 4: Simplify right side
    139,692.98x = 14,657,019,203.85
  5. Step 5: Solve for x
    x = 14,657,019,203.85/139,692.98
  6. Step 6: Final answer
    x = 104,923.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.