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Finding the Fourth Proportional to 139,692.72, 192,775.96 and 76,030.98

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Solution

The fourth proportional to 139,692.72, 192,775.96 and 76,030.98 is: 104,922.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,692.72 : 192,775.96 = 76,030.98 : x
  2. Step 2: Convert to fraction form
    139,692.72/192,775.96 = 76,030.98/x
  3. Step 3: Cross multiply
    139,692.72x = 192,775.96 × 76,030.98
  4. Step 4: Simplify right side
    139,692.72x = 14,656,945,159.24
  5. Step 5: Solve for x
    x = 14,656,945,159.24/139,692.72
  6. Step 6: Final answer
    x = 104,922.76

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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.