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Finding the Fourth Proportional to 139,489.32, 192,499.02 and 75,831.42

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Solution

The fourth proportional to 139,489.32, 192,499.02 and 75,831.42 is: 104,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,489.32 : 192,499.02 = 75,831.42 : x
  2. Step 2: Convert to fraction form
    139,489.32/192,499.02 = 75,831.42/x
  3. Step 3: Cross multiply
    139,489.32x = 192,499.02 × 75,831.42
  4. Step 4: Simplify right side
    139,489.32x = 14,597,474,035.21
  5. Step 5: Solve for x
    x = 14,597,474,035.21/139,489.32
  6. Step 6: Final answer
    x = 104,649.40

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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.