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Finding the Fourth Proportional to 139,403.91, 192,378.20 and 75,742.23

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Solution

The fourth proportional to 139,403.91, 192,378.20 and 75,742.23 is: 104,524.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.91 : 192,378.20 = 75,742.23 : x
  2. Step 2: Convert to fraction form
    139,403.91/192,378.20 = 75,742.23/x
  3. Step 3: Cross multiply
    139,403.91x = 192,378.20 × 75,742.23
  4. Step 4: Simplify right side
    139,403.91x = 14,571,153,492.67
  5. Step 5: Solve for x
    x = 14,571,153,492.67/139,403.91
  6. Step 6: Final answer
    x = 104,524.71

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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.