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Finding the Fourth Proportional to 139,897.04, 209,692.84 and 68,868.56

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Solution

The fourth proportional to 139,897.04, 209,692.84 and 68,868.56 is: 103,227.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,897.04 : 209,692.84 = 68,868.56 : x
  2. Step 2: Convert to fraction form
    139,897.04/209,692.84 = 68,868.56/x
  3. Step 3: Cross multiply
    139,897.04x = 209,692.84 × 68,868.56
  4. Step 4: Simplify right side
    139,897.04x = 14,441,243,933.11
  5. Step 5: Solve for x
    x = 14,441,243,933.11/139,897.04
  6. Step 6: Final answer
    x = 103,227.66

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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.