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Finding the Fourth Proportional to 139,689.66, 192,771.18 and 76,027.98

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Solution

The fourth proportional to 139,689.66, 192,771.18 and 76,027.98 is: 104,918.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,689.66 : 192,771.18 = 76,027.98 : x
  2. Step 2: Convert to fraction form
    139,689.66/192,771.18 = 76,027.98/x
  3. Step 3: Cross multiply
    139,689.66x = 192,771.18 × 76,027.98
  4. Step 4: Simplify right side
    139,689.66x = 14,656,003,417.62
  5. Step 5: Solve for x
    x = 14,656,003,417.62/139,689.66
  6. Step 6: Final answer
    x = 104,918.31

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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.