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Finding the Fourth Proportional to 139,354.48, 192,178.20 and 107,472.88

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Solution

The fourth proportional to 139,354.48, 192,178.20 and 107,472.88 is: 148,211.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,354.48 : 192,178.20 = 107,472.88 : x
  2. Step 2: Convert to fraction form
    139,354.48/192,178.20 = 107,472.88/x
  3. Step 3: Cross multiply
    139,354.48x = 192,178.20 × 107,472.88
  4. Step 4: Simplify right side
    139,354.48x = 20,653,944,627.22
  5. Step 5: Solve for x
    x = 20,653,944,627.22/139,354.48
  6. Step 6: Final answer
    x = 148,211.56

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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.