Home / 139,416,138.42-192,393,209.28-76,690,889.16

Finding the Fourth Proportional to 139,416,138.42, 192,393,209.28 and 76,690,889.16

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Solution

The fourth proportional to 139,416,138.42, 192,393,209.28 and 76,690,889.16 is: 105,832,842.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,416,138.42 : 192,393,209.28 = 76,690,889.16 : x
  2. Step 2: Convert to fraction form
    139,416,138.42/192,393,209.28 = 76,690,889.16/x
  3. Step 3: Cross multiply
    139,416,138.42x = 192,393,209.28 × 76,690,889.16
  4. Step 4: Simplify right side
    139,416,138.42x = 14,754,806,288,029,162
  5. Step 5: Solve for x
    x = 14,754,806,288,029,162/139,416,138.42
  6. Step 6: Final answer
    x = 105,832,842.99

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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.