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Finding the Fourth Proportional to 66,446,919.70, 99,670,379.55 and 53,009,991.70

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Solution

The fourth proportional to 66,446,919.70, 99,670,379.55 and 53,009,991.70 is: 79,514,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,446,919.70 : 99,670,379.55 = 53,009,991.70 : x
  2. Step 2: Convert to fraction form
    66,446,919.70/99,670,379.55 = 53,009,991.70/x
  3. Step 3: Cross multiply
    66,446,919.70x = 99,670,379.55 × 53,009,991.70
  4. Step 4: Simplify right side
    66,446,919.70x = 5,283,525,992,681,350
  5. Step 5: Solve for x
    x = 5,283,525,992,681,350/66,446,919.70
  6. Step 6: Final answer
    x = 79,514,987.55

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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.