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Finding the Fourth Proportional to 139,765.52, 192,873.92 and 76,102.16

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Solution

The fourth proportional to 139,765.52, 192,873.92 and 76,102.16 is: 105,019.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,765.52 : 192,873.92 = 76,102.16 : x
  2. Step 2: Convert to fraction form
    139,765.52/192,873.92 = 76,102.16/x
  3. Step 3: Cross multiply
    139,765.52x = 192,873.92 × 76,102.16
  4. Step 4: Simplify right side
    139,765.52x = 14,678,121,919.67
  5. Step 5: Solve for x
    x = 14,678,121,919.67/139,765.52
  6. Step 6: Final answer
    x = 105,019.62

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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.