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Finding the Fourth Proportional to 139,687.32, 192,767.94 and 76,025.10

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Solution

The fourth proportional to 139,687.32, 192,767.94 and 76,025.10 is: 104,914.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,687.32 : 192,767.94 = 76,025.10 : x
  2. Step 2: Convert to fraction form
    139,687.32/192,767.94 = 76,025.10/x
  3. Step 3: Cross multiply
    139,687.32x = 192,767.94 × 76,025.10
  4. Step 4: Simplify right side
    139,687.32x = 14,655,201,915.29
  5. Step 5: Solve for x
    x = 14,655,201,915.29/139,687.32
  6. Step 6: Final answer
    x = 104,914.33

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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.