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Finding the Fourth Proportional to 139,360, 192,320.32 and 75,697.80

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Solution

The fourth proportional to 139,360, 192,320.32 and 75,697.80 is: 104,464.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,360 : 192,320.32 = 75,697.80 : x
  2. Step 2: Convert to fraction form
    139,360/192,320.32 = 75,697.80/x
  3. Step 3: Cross multiply
    139,360x = 192,320.32 × 75,697.80
  4. Step 4: Simplify right side
    139,360x = 14,558,225,119.30
  5. Step 5: Solve for x
    x = 14,558,225,119.30/139,360
  6. Step 6: Final answer
    x = 104,464.88

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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.