Home / 78,732,136.80-118,098,205.20-21,230,220.60

Finding the Fourth Proportional to 78,732,136.80, 118,098,205.20 and 21,230,220.60

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Solution

The fourth proportional to 78,732,136.80, 118,098,205.20 and 21,230,220.60 is: 31,845,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,136.80 : 118,098,205.20 = 21,230,220.60 : x
  2. Step 2: Convert to fraction form
    78,732,136.80/118,098,205.20 = 21,230,220.60/x
  3. Step 3: Cross multiply
    78,732,136.80x = 118,098,205.20 × 21,230,220.60
  4. Step 4: Simplify right side
    78,732,136.80x = 2,507,250,948,860,067.50
  5. Step 5: Solve for x
    x = 2,507,250,948,860,067.50/78,732,136.80
  6. Step 6: Final answer
    x = 31,845,330.90

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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.