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Finding the Fourth Proportional to 98,241.74, 147,363.62 and 78,644.87

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Solution

The fourth proportional to 98,241.74, 147,363.62 and 78,644.87 is: 117,968.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,241.74 : 147,363.62 = 78,644.87 : x
  2. Step 2: Convert to fraction form
    98,241.74/147,363.62 = 78,644.87/x
  3. Step 3: Cross multiply
    98,241.74x = 147,363.62 × 78,644.87
  4. Step 4: Simplify right side
    98,241.74x = 11,589,392,737.63
  5. Step 5: Solve for x
    x = 11,589,392,737.63/98,241.74
  6. Step 6: Final answer
    x = 117,968.11

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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.