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Finding the Fourth Proportional to 100,894.50, 139,234.41 and 58,477.64

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Solution

The fourth proportional to 100,894.50, 139,234.41 and 58,477.64 is: 80,699.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,894.50 : 139,234.41 = 58,477.64 : x
  2. Step 2: Convert to fraction form
    100,894.50/139,234.41 = 58,477.64/x
  3. Step 3: Cross multiply
    100,894.50x = 139,234.41 × 58,477.64
  4. Step 4: Simplify right side
    100,894.50x = 8,142,099,007.42
  5. Step 5: Solve for x
    x = 8,142,099,007.42/100,894.50
  6. Step 6: Final answer
    x = 80,699.14

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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.