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Finding the Fourth Proportional to 121,987,687.64, 182,991,865.03 and 39,001,404.02

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Solution

The fourth proportional to 121,987,687.64, 182,991,865.03 and 39,001,404.02 is: 58,505,409.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,987,687.64 : 182,991,865.03 = 39,001,404.02 : x
  2. Step 2: Convert to fraction form
    121,987,687.64/182,991,865.03 = 39,001,404.02/x
  3. Step 3: Cross multiply
    121,987,687.64x = 182,991,865.03 × 39,001,404.02
  4. Step 4: Simplify right side
    121,987,687.64x = 7,136,939,659,395,877
  5. Step 5: Solve for x
    x = 7,136,939,659,395,877/121,987,687.64
  6. Step 6: Final answer
    x = 58,505,409.83

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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.