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Finding the Fourth Proportional to 139,677.83, 192,759.44 and 76,019.66

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Solution

The fourth proportional to 139,677.83, 192,759.44 and 76,019.66 is: 104,909.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,677.83 : 192,759.44 = 76,019.66 : x
  2. Step 2: Convert to fraction form
    139,677.83/192,759.44 = 76,019.66/x
  3. Step 3: Cross multiply
    139,677.83x = 192,759.44 × 76,019.66
  4. Step 4: Simplify right side
    139,677.83x = 14,653,505,746.69
  5. Step 5: Solve for x
    x = 14,653,505,746.69/139,677.83
  6. Step 6: Final answer
    x = 104,909.32

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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.