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Finding the Fourth Proportional to 98,959.05, 148,401.72 and 39,774.78

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Solution

The fourth proportional to 98,959.05, 148,401.72 and 39,774.78 is: 59,647.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,959.05 : 148,401.72 = 39,774.78 : x
  2. Step 2: Convert to fraction form
    98,959.05/148,401.72 = 39,774.78/x
  3. Step 3: Cross multiply
    98,959.05x = 148,401.72 × 39,774.78
  4. Step 4: Simplify right side
    98,959.05x = 5,902,645,764.62
  5. Step 5: Solve for x
    x = 5,902,645,764.62/98,959.05
  6. Step 6: Final answer
    x = 59,647.36

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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.