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Finding the Fourth Proportional to 289,706,680.80, 434,637,003.60 and 125,874,136.80

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Solution

The fourth proportional to 289,706,680.80, 434,637,003.60 and 125,874,136.80 is: 188,844,653.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,706,680.80 : 434,637,003.60 = 125,874,136.80 : x
  2. Step 2: Convert to fraction form
    289,706,680.80/434,637,003.60 = 125,874,136.80/x
  3. Step 3: Cross multiply
    289,706,680.80x = 434,637,003.60 × 125,874,136.80
  4. Step 4: Simplify right side
    289,706,680.80x = 54,709,557,649,488,496
  5. Step 5: Solve for x
    x = 54,709,557,649,488,496/289,706,680.80
  6. Step 6: Final answer
    x = 188,844,653.15

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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.