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Finding the Fourth Proportional to 139,286.40, 192,214.68 and 75,624.20

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Solution

The fourth proportional to 139,286.40, 192,214.68 and 75,624.20 is: 104,361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,286.40 : 192,214.68 = 75,624.20 : x
  2. Step 2: Convert to fraction form
    139,286.40/192,214.68 = 75,624.20/x
  3. Step 3: Cross multiply
    139,286.40x = 192,214.68 × 75,624.20
  4. Step 4: Simplify right side
    139,286.40x = 14,536,081,403.26
  5. Step 5: Solve for x
    x = 14,536,081,403.26/139,286.40
  6. Step 6: Final answer
    x = 104,361.10

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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.