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Finding the Fourth Proportional to 103,408.85, 155,126.64 and 36,868.16

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Solution

The fourth proportional to 103,408.85, 155,126.64 and 36,868.16 is: 55,307.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,408.85 : 155,126.64 = 36,868.16 : x
  2. Step 2: Convert to fraction form
    103,408.85/155,126.64 = 36,868.16/x
  3. Step 3: Cross multiply
    103,408.85x = 155,126.64 × 36,868.16
  4. Step 4: Simplify right side
    103,408.85x = 5,719,234,309.85
  5. Step 5: Solve for x
    x = 5,719,234,309.85/103,408.85
  6. Step 6: Final answer
    x = 55,307.01

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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.