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Finding the Fourth Proportional to 201,302,053.20, 301,953,079.80 and 120,481,419.60

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Solution

The fourth proportional to 201,302,053.20, 301,953,079.80 and 120,481,419.60 is: 180,722,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,302,053.20 : 301,953,079.80 = 120,481,419.60 : x
  2. Step 2: Convert to fraction form
    201,302,053.20/301,953,079.80 = 120,481,419.60/x
  3. Step 3: Cross multiply
    201,302,053.20x = 301,953,079.80 × 120,481,419.60
  4. Step 4: Simplify right side
    201,302,053.20x = 36,379,735,706,896,080
  5. Step 5: Solve for x
    x = 36,379,735,706,896,080/201,302,053.20
  6. Step 6: Final answer
    x = 180,722,129.40

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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.