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Finding the Fourth Proportional to 139,666.53, 192,739.46 and 76,004.31

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Solution

The fourth proportional to 139,666.53, 192,739.46 and 76,004.31 is: 104,885.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,666.53 : 192,739.46 = 76,004.31 : x
  2. Step 2: Convert to fraction form
    139,666.53/192,739.46 = 76,004.31/x
  3. Step 3: Cross multiply
    139,666.53x = 192,739.46 × 76,004.31
  4. Step 4: Simplify right side
    139,666.53x = 14,649,029,287.05
  5. Step 5: Solve for x
    x = 14,649,029,287.05/139,666.53
  6. Step 6: Final answer
    x = 104,885.75

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1.5x scale

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.