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Finding the Fourth Proportional to 139,108.68, 208,692.72 and 56,002.68

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Solution

The fourth proportional to 139,108.68, 208,692.72 and 56,002.68 is: 84,015.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,108.68 : 208,692.72 = 56,002.68 : x
  2. Step 2: Convert to fraction form
    139,108.68/208,692.72 = 56,002.68/x
  3. Step 3: Cross multiply
    139,108.68x = 208,692.72 × 56,002.68
  4. Step 4: Simplify right side
    139,108.68x = 11,687,351,616.49
  5. Step 5: Solve for x
    x = 11,687,351,616.49/139,108.68
  6. Step 6: Final answer
    x = 84,015.98

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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.