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Finding the Fourth Proportional to 139,668.60, 192,744.46 and 76,008.12

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Solution

The fourth proportional to 139,668.60, 192,744.46 and 76,008.12 is: 104,892.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.60 : 192,744.46 = 76,008.12 : x
  2. Step 2: Convert to fraction form
    139,668.60/192,744.46 = 76,008.12/x
  3. Step 3: Cross multiply
    139,668.60x = 192,744.46 × 76,008.12
  4. Step 4: Simplify right side
    139,668.60x = 14,650,144,045.02
  5. Step 5: Solve for x
    x = 14,650,144,045.02/139,668.60
  6. Step 6: Final answer
    x = 104,892.18

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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.