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Finding the Fourth Proportional to 139,408.79, 192,381.36 and 75,747.05

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Solution

The fourth proportional to 139,408.79, 192,381.36 and 75,747.05 is: 104,529.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408.79 : 192,381.36 = 75,747.05 : x
  2. Step 2: Convert to fraction form
    139,408.79/192,381.36 = 75,747.05/x
  3. Step 3: Cross multiply
    139,408.79x = 192,381.36 × 75,747.05
  4. Step 4: Simplify right side
    139,408.79x = 14,572,319,533.08
  5. Step 5: Solve for x
    x = 14,572,319,533.08/139,408.79
  6. Step 6: Final answer
    x = 104,529.42

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1.5x scale

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.