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Finding the Fourth Proportional to 137,788,363.20, 206,682,544.80 and 123,758,320.80

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Solution

The fourth proportional to 137,788,363.20, 206,682,544.80 and 123,758,320.80 is: 185,637,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,788,363.20 : 206,682,544.80 = 123,758,320.80 : x
  2. Step 2: Convert to fraction form
    137,788,363.20/206,682,544.80 = 123,758,320.80/x
  3. Step 3: Cross multiply
    137,788,363.20x = 206,682,544.80 × 123,758,320.80
  4. Step 4: Simplify right side
    137,788,363.20x = 25,578,684,683,118,772
  5. Step 5: Solve for x
    x = 25,578,684,683,118,772/137,788,363.20
  6. Step 6: Final answer
    x = 185,637,481.20

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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.