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Finding the Fourth Proportional to 139,796,341.85, 192,919,164.33 and 77,915,351.81

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Solution

The fourth proportional to 139,796,341.85, 192,919,164.33 and 77,915,351.81 is: 107,523,303.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,796,341.85 : 192,919,164.33 = 77,915,351.81 : x
  2. Step 2: Convert to fraction form
    139,796,341.85/192,919,164.33 = 77,915,351.81/x
  3. Step 3: Cross multiply
    139,796,341.85x = 192,919,164.33 × 77,915,351.81
  4. Step 4: Simplify right side
    139,796,341.85x = 15,031,364,558,698,560
  5. Step 5: Solve for x
    x = 15,031,364,558,698,560/139,796,341.85
  6. Step 6: Final answer
    x = 107,523,303.97

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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.