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Finding the Fourth Proportional to 103,998.90, 155,948.94 and 51,346.89

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Solution

The fourth proportional to 103,998.90, 155,948.94 and 51,346.89 is: 76,995.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,998.90 : 155,948.94 = 51,346.89 : x
  2. Step 2: Convert to fraction form
    103,998.90/155,948.94 = 51,346.89/x
  3. Step 3: Cross multiply
    103,998.90x = 155,948.94 × 51,346.89
  4. Step 4: Simplify right side
    103,998.90x = 8,007,493,067.80
  5. Step 5: Solve for x
    x = 8,007,493,067.80/103,998.90
  6. Step 6: Final answer
    x = 76,995.94

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1.5x scale

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.