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Finding the Fourth Proportional to 137,788,361.70, 206,682,542.55 and 123,758,319.30

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Solution

The fourth proportional to 137,788,361.70, 206,682,542.55 and 123,758,319.30 is: 185,637,478.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,788,361.70 : 206,682,542.55 = 123,758,319.30 : x
  2. Step 2: Convert to fraction form
    137,788,361.70/206,682,542.55 = 123,758,319.30/x
  3. Step 3: Cross multiply
    137,788,361.70x = 206,682,542.55 × 123,758,319.30
  4. Step 4: Simplify right side
    137,788,361.70x = 25,578,684,094,638,736
  5. Step 5: Solve for x
    x = 25,578,684,094,638,736/137,788,361.70
  6. Step 6: Final answer
    x = 185,637,478.95

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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.