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Finding the Fourth Proportional to 139,867.95, 193,019.99 and 76,205.73

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Solution

The fourth proportional to 139,867.95, 193,019.99 and 76,205.73 is: 105,165.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,867.95 : 193,019.99 = 76,205.73 : x
  2. Step 2: Convert to fraction form
    139,867.95/193,019.99 = 76,205.73/x
  3. Step 3: Cross multiply
    139,867.95x = 193,019.99 × 76,205.73
  4. Step 4: Simplify right side
    139,867.95x = 14,709,228,861.51
  5. Step 5: Solve for x
    x = 14,709,228,861.51/139,867.95
  6. Step 6: Final answer
    x = 105,165.11

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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.