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Finding the Fourth Proportional to 76,691,345.88, 105,836,668.92 and 45,356,255.91

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Solution

The fourth proportional to 76,691,345.88, 105,836,668.92 and 45,356,255.91 is: 62,593,177.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,691,345.88 : 105,836,668.92 = 45,356,255.91 : x
  2. Step 2: Convert to fraction form
    76,691,345.88/105,836,668.92 = 45,356,255.91/x
  3. Step 3: Cross multiply
    76,691,345.88x = 105,836,668.92 × 45,356,255.91
  4. Step 4: Simplify right side
    76,691,345.88x = 4,800,355,040,197,463
  5. Step 5: Solve for x
    x = 4,800,355,040,197,463/76,691,345.88
  6. Step 6: Final answer
    x = 62,593,177.69

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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.