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Finding the Fourth Proportional to 66,736,864.80, 100,105,297.20 and 51,620,320.80

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Solution

The fourth proportional to 66,736,864.80, 100,105,297.20 and 51,620,320.80 is: 77,430,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,736,864.80 : 100,105,297.20 = 51,620,320.80 : x
  2. Step 2: Convert to fraction form
    66,736,864.80/100,105,297.20 = 51,620,320.80/x
  3. Step 3: Cross multiply
    66,736,864.80x = 100,105,297.20 × 51,620,320.80
  4. Step 4: Simplify right side
    66,736,864.80x = 5,167,467,555,243,342
  5. Step 5: Solve for x
    x = 5,167,467,555,243,342/66,736,864.80
  6. Step 6: Final answer
    x = 77,430,481.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.