Home / 139,126.64-191,931-82,517.36

Finding the Fourth Proportional to 139,126.64, 191,931 and 82,517.36

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Solution

The fourth proportional to 139,126.64, 191,931 and 82,517.36 is: 113,836.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,126.64 : 191,931 = 82,517.36 : x
  2. Step 2: Convert to fraction form
    139,126.64/191,931 = 82,517.36/x
  3. Step 3: Cross multiply
    139,126.64x = 191,931 × 82,517.36
  4. Step 4: Simplify right side
    139,126.64x = 15,837,639,422.16
  5. Step 5: Solve for x
    x = 15,837,639,422.16/139,126.64
  6. Step 6: Final answer
    x = 113,836.14

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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.