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Finding the Fourth Proportional to 143,372.60, 197,859.15 and 78,844.47

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Solution

The fourth proportional to 143,372.60, 197,859.15 and 78,844.47 is: 108,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,372.60 : 197,859.15 = 78,844.47 : x
  2. Step 2: Convert to fraction form
    143,372.60/197,859.15 = 78,844.47/x
  3. Step 3: Cross multiply
    143,372.60x = 197,859.15 × 78,844.47
  4. Step 4: Simplify right side
    143,372.60x = 15,600,099,816.40
  5. Step 5: Solve for x
    x = 15,600,099,816.40/143,372.60
  6. Step 6: Final answer
    x = 108,808.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.